hyperbola

cy-noun

hyperbola m (plural hyperbolâu, not mutable)

Internationalism (see English hyperbola), ultimately from Ancient Greek ὑπερβολή (huperbolḗ).


nod

nod m (plural nodau or nodion, not mutable)

Borrowed from English node, from Latin nōdus.


sêr

sêr f (collective, singulative seren, not mutable)

From Proto-Brythonic *ster, from Proto-Celtic *sterā, from Proto-Indo-European *h₂stḗr. Cognate with Cornish ster, Breton ster.

sêr tywydd

barometer earthstars, Astraeus hygrometricus

sêr y Pyreneau

Pyrenean squills, Scilla Pyrenean squill


isosgeles

cy-adj

isosgeles (feminine singular isosgeles, plural isosgeles, not comparable)

isosgeles (feminine singular)
isosgeles (plural)
isosgeles
hisosgeles (prothesis-h)

Borrowed from Latin īsoscelēs, from Ancient Greek ἰσοσκελής (isoskelḗs), from ἴσος (ísos, “equal”) + σκέλος (skélos, “leg”).


triongl isosgeles

cy-noun

triongl isosgeles m (plural trionglau isosgeles)

trionglau isosgeles (plural)
triongl isosgeles
driongl isosgeles (soft)
nhriongl isosgeles
thriongl isosgeles


echel

echel f (plural echelau or echelydd or echeli or echyl)

echelau (plural)
echelydd (plural)
echeli (plural)
echyl (plural)
echel
hechel (prothesis-h)

From Proto-Celtic *aksilā. Cognate with Latin axis.

taflu rhywun oddi ar ei echel

to throw off, to put off, to disconcert; to throw someone off their axle


gradd

graddau (plural)
gradd
radd (soft)
ngradd

From Middle Welsh grað, from Proto-Brythonic *grað, from Latin gradus (“degree”). Doublet of gris.

o'r radd flaenaf

of the highest degree, of the best quality

(geometry) degree (unit of measurement of angle equal to ¹⁄₃₆₀ of a circle's circumference)


onglydd

onglyddion (plural)
onglydd
honglydd (prothesis-h)
onglwr (alternative)

protractor (circular or semicircular tool for measuring angles)


silindr

silindr m (plural silindrau, not mutable)

From English cylinder, from Middle French chilindre, cylindre, from Latin cylindrus, from Ancient Greek κύλινδρος (kúlindros).


estyn

cy-verb

estyn (first-person singular present estynnaf)

estynnaf (first-person present singular)
estynnaf (first-person future indicative present singular)
estynni (future indicative present second-person singular)
estyn (future indicative present singular third-person)
estynna (future indicative present singular third-person)
estynnwn (first-person future indicative plural present)
estynnwch (future indicative plural present second-person)
estynnant (future indicative plural present third-person)
estynnir (future impersonal indicative present)
estynnwn (conditional first-person singular)
estynnwn (first-person imperfect indicative singular subjunctive)
estynnit (conditional second-person singular)
estynnit (imperfect indicative second-person singular subjunctive)
estynnai (conditional singular third-person)
estynnai (imperfect indicative singular subjunctive third-person)
estynnem (conditional first-person plural)
estynnem (first-person imperfect indicative plural subjunctive)
estynnech (conditional plural second-person)
estynnech (imperfect indicative plural second-person subjunctive)
estynnent (conditional plural third-person)
estynnent (imperfect indicative plural subjunctive third-person)
estynnid (conditional impersonal)
estynnid (imperfect impersonal indicative subjunctive)
estynnais (first-person preterite singular)
estynnaist (preterite second-person singular)
estynnodd (preterite singular third-person)
estynasom (first-person plural preterite)
estynasoch (plural preterite second-person)
estynasant (plural preterite third-person)
estynnwyd (impersonal preterite)
estynaswn (first-person pluperfect singular)
estynasit (pluperfect second-person singular)
estynasai (pluperfect singular third-person)
estynasem (first-person pluperfect plural)
estynasech (pluperfect plural second-person)
estynasent (pluperfect plural third-person)
estynasid (impersonal pluperfect)
estynesid (impersonal pluperfect)
estynnwyf (first-person present singular subjunctive)
estynnych (present second-person singular subjunctive)
estynno (present singular subjunctive third-person)
estynnom (first-person plural present subjunctive)
estynnoch (plural present second-person subjunctive)
estynnont (plural present subjunctive third-person)
estynner (impersonal present subjunctive)
estyn (imperative second-person singular)
estynna (imperative second-person singular)
estynned (imperative singular third-person)
estynnwn (first-person imperative plural)
estynnwch (imperative plural second-person)
estynnent (imperative plural third-person)
estynner (imperative impersonal)
estyn (noun-from-verb singular)
estynedig (participle singular)
estynadwy (participle singular)
estynna i (first-person future singular)
estynnaf i (first-person future singular)
estynni di (future second-person singular)
estynnith o (future singular third-person)
e (future singular third-person)
hi (future singular third-person)
estynniff e (future singular third-person)
estynnwn ni (first-person future plural)
estynnwch chi (future plural second-person)
estynnan nhw (future plural third-person)
estynnwn i (conditional first-person singular)
estynswn i (conditional first-person singular)
estynnet ti (conditional second-person singular)
estynset ti (conditional second-person singular)
estynnai fo (conditional singular third-person)
fe (conditional singular third-person)
hi (conditional singular third-person)
estynsai fo (conditional singular third-person)
estynnen ni (conditional first-person plural)
estynsen ni (conditional first-person plural)
estynnech chi (conditional plural second-person)
estynsech chi (conditional plural second-person)
estynnen nhw (conditional plural third-person)
estynsen nhw (conditional plural third-person)
estynnais i (first-person preterite singular)
estynnes i (first-person preterite singular)
estynnaist ti (preterite second-person singular)
estynnest ti (preterite second-person singular)
estynnodd o (preterite singular third-person)
e (preterite singular third-person)
hi (preterite singular third-person)
estynnon ni (first-person plural preterite)
estynnoch chi (plural preterite second-person)
estynnon nhw (plural preterite third-person)
estynna (imperative second-person singular)
estynnwch (imperative plural second-person)
estyn
hestyn (prothesis-h)

From Middle Welsh estynn, from Proto-Brythonic *estɨnn (compare Cornish ystyn and Middle Breton astenn), from Latin extendō (“to extend, to stretch, to enlarge”).


diemwnt

cy-noun

diemwnt m (plural diemyntau or diemwntau or diemawns)

diemyntau (plural)
diemwntau (plural)
diemawns (plural)
diemwnt
ddiemwnt (soft)
niemwnt

(geometry) rhombus, especially when oriented so that its longer axis is vertical.


aflem

cy-adj

aflem (feminine singular aflem, plural aflem, not comparable)

aflem (feminine singular)
aflem (plural)
aflem
haflem (prothesis-h)


amgrwm

amgrwm (feminine singular amgrom, plural amgrymion, not comparable)

amgrom (feminine singular)
amgrymion (plural)
amgrwm
hamgrwm (prothesis-h)

From am- (“around, circum-”) + crwm (“crooked”).


ceugrwm

cy-adj

ceugrwm (feminine singular ceugrom, plural ceugrwm, not comparable)

ceugrom (feminine singular)
ceugrwm (plural)
ceugrwm
geugrwm (soft)
ngheugrwm
cheugrwm


anghyfochrog

anghyfochrog (feminine singular anghyfochrog, plural anghyfochrog, not comparable)

anghyfochrog (feminine singular)
anghyfochrog (plural)
anghyfochrog
hanghyfochrog (prothesis-h)

From an- (“un-”) + cyfochrog (“parallel”).


cyfochrog

cyfochrog (feminine singular cyfochrog, plural cyfochrog, not comparable)

cyfochrog (feminine singular)
cyfochrog (plural)
cyfochrog
gyfochrog (soft)
nghyfochrog
chyfochrog

From cyf- (“co-”) + ochrog (“sided, having sides”).


fector safle

cy-noun

fector safle m (plural fector safleau, not mutable)


Ewclidaidd

cy-adj

Ewclidaidd (feminine singular Ewclidaidd, plural Ewclidaidd, not comparable)

Ewclidaidd (feminine singular)
Ewclidaidd (plural)
Ewclidaidd
Hewclidaidd (prothesis-h)


hafalochrog

hafalochrog (feminine singular hafalochrog, plural hafalochrog, not comparable, not mutable)

hafalochrog (feminine singular)
hafalochrog (plural)
hafalochrog

From hafal (“equal, same”) + ochrog (“parallel”).


trigonometreg

trigonometreg
drigonometreg (soft)
nhrigonometreg
thrigonometreg
trigonomeg (alternative)

Adapted from English trigonometry + -eg.

mathematical analysis
mathematical analysis

(geometry, mathematical analysis) trigonometry


trigonometregol

cy-adj

trigonometregol (feminine singular trigonometregol, plural trigonometregol, not comparable)

trigonometregol (feminine singular)
trigonometregol (plural)
trigonometregol
drigonometregol (soft)
nhrigonometregol
thrigonometregol

(geometry, mathematical analysis) trigonometrical


trigonometrig

trigonometrig (feminine singular trigonometrig, plural trigonometrig, not comparable)

trigonometrig (feminine singular)
trigonometrig (plural)
trigonometrig
drigonometrig (soft)
nhrigonometrig
thrigonometrig

Adapted from English trigonometry + -ig.

(geometry, mathematical analysis) trigonometric


trigonometraidd

trigonometraidd (feminine singular trigonometraidd, plural trigonometraidd, not comparable)

trigonometraidd (feminine singular)
trigonometraidd (plural)
trigonometraidd
drigonometraidd (soft)
nhrigonometraidd
thrigonometraidd

Adapted from English trigonometry + -aidd.

(geometry, mathematical analysis, rare) trigonometric


hanner cylch

cy-noun

hanner cylch m (plural haneri cylch or haneri cylchoedd, not mutable)

haneri cylch (plural)
haneri cylchoedd (plural)


conigol

cy-adj

conigol (feminine singular conigol, plural conigol, not comparable)

conigol (feminine singular)
conigol (plural)
conigol
gonigol (soft)
nghonigol
chonigol

Adapted borrowing of English conical with the Welsh suffixes -ig + -ol.


diamedr

diamedrau (plural)
diamedr
ddiamedr (soft)
niamedr