torus

nl-noun

torus m (plural torussen, diminutive torusje n)

torussen (plural)
torusje (diminutive neuter)


trapezium

trapezium n (plural trapeziums or trapezia, diminutive trapeziumpje n)

trapeziums (plural)
trapezia (plural)
trapeziumpje (diminutive neuter)

Borrowed from Late Latin trapezium, from Ancient Greek τραπέζιον (trapézion, “irregular quadrilateral”), diminutive of τράπεζα (trápeza, “table”).

der

(geometry) a trapezium, trapezoid, a quadrilateral with two sides parallel


diameter

nl-noun

diameter m (plural diameters, diminutive diametertje n)

diameters (plural)
diametertje (diminutive neuter)

→ Indonesian: diameter

Borrowed from French diamètre, from Latin diametrus, from Ancient Greek διάμετρος (diámetros). Equivalent to dia- + meter.


punt

punt n (plural punten, diminutive puntje n)

punten (plural)
puntje (diminutive neuter)

In de meetkunde is een punt een locatie zonder omvang.

In geometry, a point is a location with no size.

Teken een punt A op het papier.

Twee punten bepalen een rechte lijn.


centrum

centrum n (plural centra or centrums, diminutive centrumpje n)

centra (plural)
centrums (plural)
centrumpje (diminutive neuter)

Afrikaans: sentrum

→ Indonesian: sentra (from the plural)


supplement

supplement n (plural supplementen, diminutive supplementje n)

supplementen (plural)
supplementje (diminutive neuter)

Borrowed from Middle French supplément, from Latin supplēmentum.

(geometry) a supplementary angle, which, when added to a given angle, makes 180°


ster

ster f (plural sterren, diminutive sterretje n)

sterren (plural)
sterretje (diminutive neuter)

Afrikaans: ster

Negerhollands: ster

→ Indonesian: seter

From Middle Dutch sterre, sterne, from Old Dutch sterro, sterno, from Proto-West Germanic *sternō, from Proto-Germanic *sternô, *sternǭ, from Proto-Indo-European *h₂stḗr.

(geometry) a concave polygon with regular, pointy protrusions and indentations, generally with five or six points


evenwijdig

nl-adj

evenwijdig (comparative evenwijdiger, superlative evenwijdigst)

evenwijdiger (comparative)
evenwijdigst (superlative)
evenwijdig (adverbial positive predicative)
evenwijdiger (adverbial comparative predicative)
het evenwijdigst (adverbial predicative superlative)
het evenwijdigste (adverbial predicative superlative)
evenwijdige (feminine indefinite masculine positive singular)
evenwijdigere (comparative feminine indefinite masculine singular)
evenwijdigste (feminine indefinite masculine singular superlative)
evenwijdig (indefinite neuter positive singular)
evenwijdiger (comparative indefinite neuter singular)
evenwijdigste (indefinite neuter singular superlative)
evenwijdige (indefinite plural positive)
evenwijdigere (comparative indefinite plural)
evenwijdigste (indefinite plural superlative)
evenwijdige (definite positive)
evenwijdigere (comparative definite)
evenwijdigste (definite superlative)
evenwijdigs (partitive positive)
evenwijdigers (comparative partitive)

From even (“even”) + wijd (“wide”) + -ig (“-y”).


sfeer

nl-noun

sfeer f or m (plural sferen, diminutive sfeertje n)

sferen (plural)
sfeertje (diminutive neuter)

From Middle Dutch spere, from Middle French spere, from Old French spere, from Medieval Latin spera, from sphaera, from Ancient Greek σφαῖρα (sphaîra).

(literally, geometry) sphere, round object


driehoek

driehoek m (plural driehoeken, diminutive driehoekje n)

driehoeken (plural)
driehoekje (diminutive neuter)

Afrikaans: driehoek

→ Papiamentu: drihuk

From Middle Dutch driehoec, calque of Latin triangulum. Equivalent to drie + hoek.


graad

graad m (plural graden, diminutive graadje n)

graden (plural)
graadje (diminutive neuter)

Afrikaans: graad

→ Indonesian: grad

From Middle Dutch graet, from Latin gradus.


ruit

ruit f (plural ruiten, diminutive ruitje n)

ruiten (plural)
ruitje (diminutive neuter)

Afrikaans: ruit

From Middle Dutch rute, of uncertain origin. Compare German Raute.

(geometry) the shape rhombus, an equilateral parallelogram


boog

boog m (plural bogen, diminutive boogje n)

bogen (plural)
boogje (diminutive neuter)

Negerhollands: boog

→ Dhivehi: ބޯކު (bōku)

→ Papiamentu: bog, boog

→ Sinhalese: බෝක්කුව (bōkkuwa)

From Middle Dutch bōge, from Old Dutch bogo, from Proto-West Germanic *bogō, from Proto-Germanic *bugô.


achthoek

achthoek m (plural achthoeken, diminutive achthoekje n)

achthoeken (plural)
achthoekje (diminutive neuter)

Afrikaans: agthoek


lijn

lijn f (plural lijnen, diminutive lijntje n)

lijnen (plural)
lijntje (diminutive neuter)

Berbice Creole Dutch: leni, lin

→ Indonesian: lin

From Middle Dutch līne, from Old Dutch *līna, from Proto-Germanic *līnǭ, ultimately from Proto-Indo-European *līno- (“flax”). In several senses influenced by Latin līnea; compare linie.


zwaartepunt

zwaartepunt n (plural zwaartepunten, diminutive zwaartepuntje n)

zwaartepunten (plural)
zwaartepuntje (diminutive neuter)

Afrikaans: swaartepunt

→ West Frisian: swiertepunt (calque)


veelhoek

veelhoek m (plural veelhoeken, diminutive veelhoekje n)

veelhoeken (plural)
veelhoekje (diminutive neuter)

Afrikaans: veelhoek

→ German: Vieleck (calque)

Compound of veel (“much, many”) + hoek (“angle, corner”), coined by Simon Stevin as a purism for Latin polygonum, therefore a calque of Ancient Greek πολύγωνον (polúgōnon).

calque

(geometry) polygon (plane figure bounded by straight edges)


straal

nl-noun

straal m or f (plural stralen, diminutive straaltje n)

stralen (plural)
straaltje (diminutive neuter)

Afrikaans: straal

→ Papiamentu: stral, straal

From Middle Dutch strâel, strâle, from Old Dutch strāla, from Proto-West Germanic *strālu.


rechthoek

rechthoek m (plural rechthoeken, diminutive rechthoekje n)

rechthoeken (plural)
rechthoekje (diminutive neuter)

Afrikaans: reghoek

From recht + hoek, calque of Latin rectangulum.


spiegeling

spiegeling f (plural spiegelingen, diminutive spiegelingetje n)

spiegelingen (plural)
spiegelingetje (diminutive neuter)


lijnstuk

lijnstuk n (plural lijnstukken, diminutive lijnstukje n)

lijnstukken (plural)
lijnstukje (diminutive neuter)


brandpunt

brandpunt n (plural brandpunten, diminutive brandpuntje n)

brandpunten (plural)
brandpuntje (diminutive neuter)

→ Japanese: ピント


raaklijn

raaklijn f (plural raaklijnen, diminutive raaklijntje n)

raaklijnen (plural)
raaklijntje (diminutive neuter)

From raken (“to touch”) + lijn (“line”), calque of Latin tangēns līnea. Coined by Simon Stevin.


snijpunt

snijpunt n (plural snijpunten, diminutive snijpuntje n)

snijpunten (plural)
snijpuntje (diminutive neuter)

(geometry) point of simple crossing between two curves – i.e. point of intersection but not of tangency


raakpunt

raakpunt n (plural raakpunten, diminutive raakpuntje n)

raakpunten (plural)
raakpuntje (diminutive neuter)


omtrek

omtrek m (plural omtrekken, diminutive omtrekje n)

omtrekken (plural)
omtrekje (diminutive neuter)


ovaal

ovaal n (plural ovalen, diminutive ovaaltje n)

ovalen (plural)
ovaaltje (diminutive neuter)

(geometry) oval, shape like an egg or ellipse


kubus

kubus m (plural kubussen or kuben, diminutive kubusje n)

kubussen (plural)
kuben (plural)
kubusje (diminutive neuter)

→ Indonesian: kubus

From Latin cubus, from Ancient Greek κύβος (kúbos).


vijfhoek

vijfhoek m (plural vijfhoeken, diminutive vijfhoekje n)

vijfhoeken (plural)
vijfhoekje (diminutive neuter)

(geometry) pentagon (a polygon with five sides and five angles)


hoogtepunt

hoogtepunt n (plural hoogtepunten, diminutive hoogtepuntje n)

hoogtepunten (plural)
hoogtepuntje (diminutive neuter)

From hoogte (“height”) + punt (“point”).

(geometry) altitude (the distance measured perpendicularly from a figure's vertex to the opposite side of the vertex)


middellijn

middellijn f (plural middellijnen, diminutive middellijntje n)

middellijnen (plural)
middellijntje (diminutive neuter)

→ Indonesian: garis tengah (calque)


loodrecht

nl-adj

loodrecht (comparative loodrechter, superlative loodrechtst)

loodrechter (comparative)
loodrechtst (superlative)
loodrecht (adverbial positive predicative)
loodrechter (adverbial comparative predicative)
het loodrechtst (adverbial predicative superlative)
het loodrechtste (adverbial predicative superlative)
loodrechte (feminine indefinite masculine positive singular)
loodrechtere (comparative feminine indefinite masculine singular)
loodrechtste (feminine indefinite masculine singular superlative)
loodrecht (indefinite neuter positive singular)
loodrechter (comparative indefinite neuter singular)
loodrechtste (indefinite neuter singular superlative)
loodrechte (indefinite plural positive)
loodrechtere (comparative indefinite plural)
loodrechtste (indefinite plural superlative)
loodrechte (definite positive)
loodrechtere (comparative definite)
loodrechtste (definite superlative)
loodrechts (partitive positive)
loodrechters (comparative partitive)

From lood (“plumb bob”) + recht (“straight”). Purism introduced by Simon Stevin in the 16th century to replace the Dutch word perpendiculair (“perpendicular”) which was a borrowing from Latin perpendiculum.


oppervlakte

nl-noun

oppervlakte f (plural oppervlakten or oppervlaktes)

oppervlakten (plural)
oppervlaktes (plural)

Afrikaans: oppervlakte

From opper- + vlakte.
Could be a calque of Latin superficiēs.
Attested since at least 1704.


excentrisch

nl-adj

excentrisch (comparative excentrischer, superlative meest excentrisch)

excentrischer (comparative)
meest excentrisch (superlative)
excentrisch (adverbial positive predicative)
excentrischer (adverbial comparative predicative)
het meest excentrisch (adverbial predicative superlative)
het meest excentrische (adverbial predicative superlative)
excentrische (feminine indefinite masculine positive singular)
excentrischere (comparative feminine indefinite masculine singular)
meest excentrische (feminine indefinite masculine singular superlative)
excentrisch (indefinite neuter positive singular)
excentrischer (comparative indefinite neuter singular)
meest excentrische (indefinite neuter singular superlative)
excentrische (indefinite plural positive)
excentrischere (comparative indefinite plural)
meest excentrische (indefinite plural superlative)
excentrische (definite positive)
excentrischere (comparative definite)
meest excentrische (definite superlative)
excentrisch (partitive positive)
excentrischers (comparative partitive)

Probably borrowed from German exzentrisch.

(geometry, of a conic section) eccentric


spiraal

nl-noun

spiraal f (plural spiralen, diminutive spiraaltje n)

spiralen (plural)
spiraaltje (diminutive neuter)

→ Indonesian: spiral

Borrowed from French spirale, from Medieval Latin spiralis, from Latin spira, from Ancient Greek σπεῖρα (speîra, “wreath, coil, twist”).


hypotenusa

nl-noun

hypotenusa f (plural hypotenusa's, diminutive hypotenusaatje n)

hypotenusa's (plural)
hypotenusaatje (diminutive neuter)

→ Indonesian: hipotenusa

Borrowed from Latin hypotenusa. Cognate with Swedish hypotenusa, English hypotenuse, French hypoténuse, German Hypotenuse etc.

(geometry) hypotenuse (side of a right triangle opposite the right angle)


kruispunt

kruispunt n (plural kruispunten, diminutive kruispuntje n)

kruispunten (plural)
kruispuntje (diminutive neuter)

From kruisen (“to cross, to intersect”) + punt (“point, spot”).


doorsnede

nl-noun

doorsnede f (plural doorsneden or doorsnedes, diminutive doorsneetje n)

doorsneden (plural)
doorsnedes (plural)
doorsneetje (diminutive neuter)
doorsnee (alternative)

From doorsnijden (“to cut through, divide (in two)”). Equivalent to door + snede.

De grootte van Eris is echter met behulp van de Hubble-telescoop direct gemeten, en hieruit is gebleken dat deze in doorsnede inderdaad ongeveer 2400 km bedraagt.

The size of Eris has been measured, however, directly with the help of the Hubble telescope, and from this it has become apparent that it indeed amounts to approximately 2400 km in diameter.


kettinglijn

kettinglijn f (plural kettinglijnen, diminutive kettinglijntje n)

kettinglijnen (plural)
kettinglijntje (diminutive neuter)


projecteren

projecteren (infinitive)
projecteren (gerund neuter)
projecteer (first-person present singular)
projecteerde (first-person past singular)
projecteert (present second-person singular)
projecteer (present second-person singular)
projecteerde (past second-person singular)
projecteert (formal present second-person singular)
projecteerde (formal past second-person singular)
projecteert (Flanders colloquial present second-person singular)
projecteert (archaic formal majestic present second-person singular)
projecteerde (Flanders colloquial past second-person singular)
projecteerde (archaic formal majestic past second-person singular)
projecteert (present singular third-person)
projecteerde (past singular third-person)
projecteren (plural present)
projecteerden (past plural)
projectere (archaic present singular subjunctive)
projecteerde (archaic past singular subjunctive)
projecteren (archaic plural present subjunctive)
projecteerden (archaic past plural subjunctive)
projecteer (imperative present singular)
projecteert (archaic imperative plural present)
projecterend (participle present)
geprojecteerd (participle past)

Ultimately from Latin prōiectus, past participle of prōiciō.

(transitive, mathematics, geometry) to project (to draw straight lines from a fixed point)


excentriciteit

excentriciteit f (plural excentriciteiten)

From excentriek or excentrisch + -iteit.

(geometry, of a conic section) eccentricity


hexagonaal

hexagonaal (adverbial positive predicative)
hexagonale (feminine indefinite masculine positive singular)
hexagonaal (indefinite neuter positive singular)
hexagonale (indefinite plural positive)
hexagonale (definite positive)
hexagonaals (partitive positive)

From Ancient Greek [Term?] (“six angles”), equivalent to hexagon + -aal. Cognate with English hexagonal, French hexagonal, German hexagonal.

(geometry) hexagonal, having six edges, or having a cross-section in the form of a hexagon


achthoekig

nl-adj

achthoekig (comparative achthoekiger, superlative achthoekigst)

achthoekiger (comparative)
achthoekigst (superlative)
achthoekig (adverbial positive predicative)
achthoekiger (adverbial comparative predicative)
het achthoekigst (adverbial predicative superlative)
het achthoekigste (adverbial predicative superlative)
achthoekige (feminine indefinite masculine positive singular)
achthoekigere (comparative feminine indefinite masculine singular)
achthoekigste (feminine indefinite masculine singular superlative)
achthoekig (indefinite neuter positive singular)
achthoekiger (comparative indefinite neuter singular)
achthoekigste (indefinite neuter singular superlative)
achthoekige (indefinite plural positive)
achthoekigere (comparative indefinite plural)
achthoekigste (indefinite plural superlative)
achthoekige (definite positive)
achthoekigere (comparative definite)
achthoekigste (definite superlative)
achthoekigs (partitive positive)
achthoekigers (comparative partitive)

Afrikaans: agthoekig


coördinatenstelsel

nl-noun

coördinatenstelsel n (plural coördinatenstelsels, diminutive coördinatenstelseltje n)

coördinatenstelsels (plural)
coördinatenstelseltje (diminutive neuter)

Compound of coördinaat + -en- + stelsel.


steradiaal

steradiaal m (plural steradialen, diminutive steradiaaltje n)

steradialen (plural)
steradiaaltje (diminutive neuter)


radiaal

radiaal m (plural radialen, diminutive radiaaltje n)

radialen (plural)
radiaaltje (diminutive neuter)


loodlijn

loodlijn f (plural loodlijnen, diminutive loodlijntje n)

loodlijnen (plural)
loodlijntje (diminutive neuter)


lijnrecht

lijnrecht (adverbial positive predicative)
lijnrechte (feminine indefinite masculine positive singular)
lijnrecht (indefinite neuter positive singular)
lijnrechte (indefinite plural positive)
lijnrechte (definite positive)
lijnrechts (partitive positive)

(geometry) perfectly straight, with curvature or aberration


polygoon

→ Indonesian: poligon

Borrowed from French polygone, from Latin polygōnum, from Ancient Greek πολύγωνον (polúgōnon).

Polly zij een concave polygoon met hoeken A₁, … Aₙ in een Euclidische ruimte en wil een cracker.

Polly be a concave polygon with angles A₁, … Aₙ in a Euclidean space and wants a cracker.


driehoeksmeting

driehoeksmeting f (plural driehoeksmetingen)


projectie

→ Indonesian: proyèksi

(geometry) a projection (creation of a figure by drawing lines through a fixed reference; a figure created in this way)


gelijkbenig

gelijkbenig (adverbial positive predicative)
gelijkbenige (feminine indefinite masculine positive singular)
gelijkbenig (indefinite neuter positive singular)
gelijkbenige (indefinite plural positive)
gelijkbenige (definite positive)
gelijkbenigs (partitive positive)

From gelijk (“equal”) + been (“leg”) + -ig.

een gelijkbenige driehoek

(geometry) isosceles (having two sides of equal length)


middelloodlijn

middelloodlijn f (plural middelloodlijnen, diminutive middelloodlijntje n)

middelloodlijnen (plural)
middelloodlijntje (diminutive neuter)


bbh

bbh f (plural bbh's, diminutive bbh'tje n)

bbh's (plural)
bbh'tje (diminutive neuter)

initialism of bijbehorende hoogte (“height associated with the base length of a triangle”)