f

Modification of upper case Latin letter F, from Greek Ϝ (W, “Digamma”), from Phœnician 𐤅 (W, “waw”), the ultimate source being probably Egyptian.


A

atomic mass number
atomic mass number#English

(chemistry, physics) Symbol for mass number (“nucleon number”). Abbreviation of English atomic mass number..


A

International System of Units
International System of Units

(physics, International System of Units) Ampere, a unit of electrical current.


v

Pronunciation of IPA [ɑvvɑʔ] with the sound [v]


b

Pronunciation of IPA [bɑː, ɑbbɑː] with the sound [b]

Modification of capital letter B by dropping its upper loop, from the Greek letter Β (“Beta”).


k

(physics) the spring constant of an elastic material

Boltzmann's constant
Boltzmann's constant


n

From the old Latin N, from the Greek Ν (nu), from an archaic reversed Greek N, from the Phoenician symbol 𐤍; possibly from an earlier Egyptian hieroglyph of a resting Egyptian cobra, D (𓆓).


c

(physics) The speed of light, 2.99792458 × 10⁸ m/s.


e

Close-mid front unrounded vowel
e
e (mathematical constant

Pronunciation of IPA [eː]

Modification of capital letter E in uncial script, from Ancient Greek Ε (E, Epsilon).


u

Pronunciation of IPA [uː]


Cd

(physics) The drag coefficient (C_d or Cₓ), describing a characteristic amount of aerodynamic drag caused by fluid flow.


Tc

It implies that if the critical temperature T_c is unique, then it must occur when x = 1, v = q

1973, “Potts model at the critical temperature”, in Journal of Physics C: Solid State Physics, volume 6, number 23, →DOI

critical temperature
critical temperature


Rn

(chemistry, physics) radon; ²²²₈₆Rn (radon-222); an isotope of radon, used when radon-220 is called thoron (Tn) and radon-219 is called actinon (An)


pu

electrical engineering
electrical engineering


μg

(physics) Misspelling of µG (“microgauss”).


η

coefficient of viscosity
coefficient of viscosity

(chemistry, physics) The coefficient of viscosity.

Sommerfeld parameter
Sommerfeld parameter


ℎ

Max Planck wrote h for German Hilfsgrösse.

(physics) The symbol for Planck's constant.


(particle physics) Used to designate a resonance.


var

(physics, electrics) Alternative form of VAR


Ba

(physics) The CGS symbol for barye, unit of pressure.


Bi

(electricity, physics) biot (“abampere”)


Jy

(physics) Symbol for jansky, a unit of flux density.


Mu

(chemistry, physics) The chemical symbol for muonium (antimuon–electron pair pseudo-element; not the muon–antimuon onium pair (muononium))


C

* (element symbol, carbon): abbreviation
* (metrology, coulomb): abbreviation
* (computing, hexadecimal 12): From its position as the twelfth element of the series {1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F}


F

From the Etruscan letter 𐌅 (v, “ve”), from the Ancient Greek letter Ϝ (W, “digamma”), derived from the Phoenician letter 𐤅 (w, “waw”), from the Egyptian hieroglyph 𓏲.


(mathematics, physics) The second time-differential. E.g. x (position), ẋ (velocity), ẍ (acceleration).


B

magnetic flux density
magnetic flux density


E

From the Etruscan letter 𐌄 (e, “e”), from the Ancient Greek letter Ε (E, “epsilon”), derived from the Phoenician letter 𐤄 (h, “he”), from the Egyptian hieroglyph 𓀠.


L

From the Etruscan letter 𐌋 (l, “el”), from the Ancient Greek letter Λ (L, “lambda”), derived from the Phoenician letter 𐤋 (l, “lamed”), from the Egyptian hieroglyph 𓌅.

(astronomy, physics, measurement, cgs) lambert


G

From a modification of the Latin letter C (“ce”), from the Etruscan letter 𐌂 (c, “ce”), from the Ancient Greek letter Γ (G, “gamma”), derived from the Phoenician letter 𐤂 (g, “giml”), from the Egyptian hieroglyph 𓌙.

gravitational constant
gravitational constant

(physics) The gravitational constant in the formula F = Gm₁m₂/r²; sometimes called "big G" to distinguish from g for the acceleration of gravity.


H

From the Etruscan letter 𐌇 (h, he), from the Ancient Greek letter Η (Ē, eta), derived from the Phoenician letter 𐤇 (ḥ, het), from the Egyptian hieroglyph 𓈈 or maybe 𓉗.

electrical inductance
electrical inductance

(physics) Symbol for a henry, a unit for measurement of electrical inductance in the International System of Units.


N

From the Etruscan letter 𐌍 (n, en), from the Ancient Greek letter Ν (N, nu), derived from the Phoenician letter 𐤍 (n, nun), possibly from the Egyptian hieroglyph 𓆓.


R

From the Etruscan letter 𐌓 (r, “er”), from the Ancient Greek letter Ρ (R, “rho”), derived from the Phoenician letter 𐤓 (r, “reš”), from the Egyptian hieroglyph 𓁶.


W

From a modification of the Latin letter V (“ve”), from the Etruscan letter 𐌖 (u, “u”), from the Ancient Greek letter Υ (U, “ypsilon”), derived from the Phoenician letter 𐤅 (w, “waw”), from the Egyptian hieroglyph 𓏲.
Its use as a symbol for tungsten is based on German Wolfram.


P

From the Etruscan letter 𐌐 (p, “pe”), from the Ancient Greek letter Π (P, “pi”), derived from the Phoenician letter 𐤐 (p, “pe”), from the Egyptian hieroglyph 𓂋.


Z

From the Etruscan letter 𐌆 (z, “ze”), from the Ancient Greek letter Ζ (Z, “zeta”), derived from the Phoenician letter 𐤆 (z, “zayin”), from the Egyptian hieroglyph 𓏭.

(physics) the impedance of an electrical circuit

(physics, computer graphics) the depth dimension in a 3D environment


U

From the Etruscan letter 𐌖 (u, “u”), from the Ancient Greek letter Υ (U, “ypsilon”), derived from the Phoenician letter 𐤅 (w, “waw”), from the Egyptian hieroglyph 𓏲. Doublet of Y and V.


Q

English: max Q

Ancient Greek language
Egyptian language
Etruscan language
Phoenician language
Q

From the Etruscan letter 𐌒 (q, “cu”), from the Ancient Greek letter Ϙ (Q, “qoppa”), derived from the Phoenician letter 𐤒 (q, “qop”), from the Egyptian hieroglyph 𓃻.


(chemistry, physics) an electron orbital type


I

From the Etruscan letter 𐌉 (i), from the Ancient Greek letter Ι (I, iota), derived from the Phoenician letter 𐤉 (y, yod), from the Egyptian hieroglyph 𓂝.

(physics, electronics) Electrical current.

(physics, kinematics) moment of inertia.


VAR

(physics, electrics) volt-ampere reactive


β

IPA

(physics) beta ray, beta particle, beta radiation


Ξ

Those smaller particles are quarks in this case, meaning that the Ξ_(cc)⁺⁺ is a hadron

2017 August 20, Jon Butterworth, “Newly discovered particles, and what's in them”, in The Guardian (in English)

the generic name for particles made of quarks.

(particle physics) Xi baryon; cascade particle


μ

coefficient of friction
coefficient of friction

magnetic permeability
magnetic permeability

Coordinate term: Å (ångström)


σ

Stefan-Boltzmann constant
Stefan-Boltzmann constant

(physics) The Stefan-Boltzmann constant.


τ

The first one was made by the Viking Orbiter 1 spacecraft in 1980 (Duxbury and Ocampo, 1988) and brought a negative result, setting the upper limit of the normal optical depth of the putative tori to #x5C;tau#x5C;lesssim 3#x5C;times 10#x7B;-5#x7D;.

2006 August, Alexander V. Krivov, Artem G. Feofilov, Valeri V. Dikarev, “Search for the putative dust belts of Mars: The late 2007 opportunity”, in Planetary and Space Science, volume 54, numbers 9–10, →DOI, page 871


ψ

(physics, biochemistry) Water potential in cells.


(mathematics, physics) A vector pointing into the page.


ℏ

(physics) Reduced Planck's constant. Has the value ℎ/2π (where ℎ is Planck's constant), or approximately 1.05457182×10⁻³⁴ J⋅s.


Ts

(chemistry, physics) tennessine (element-117; ununseptium)


esu

(metrology, physics) The symbol for electrostatic unit of charge or statcoulomb, a unit of electric charge in the CGS system.


head

+ (English symbol name plus sign or plus)

plus sign (English name symbol)
plus (English name symbol)

antonym(s) of “addition or positiveness”

From a ligature of Latin et (“and”). Compare & and ⁊ of same meaning.


antonym(s) of “all except relative complement”

There are many theories regarding the origin of the minus sign. According to one theory, it originates from a handwriting form of the letter m (for minus) that came to resemble a horizontal bar, Another theory traces it back to a hieratic sign.


○ and ◌⃝ for uses of a letter inside a circle


kS

(metrology, electronics) Symbol for the kilosample, a unit equal to 10³ samples.


ħ

IPA

Originally devised for use in Maltese; see that entry for more details. First adopted as the IPA symbol for the voiceless pharyngeal fricative in 1921.

(physics) a typesetting error for the reduced Planck's constant, ⟨ℏ⟩.

Ⱥⱥ Ƀƀ Ȼȼ Đđ Ɇɇ Ǥǥ Ħħ Ɨɨ Ɉɉ Ꝁꝁ Łł Øø Ᵽᵽ Ɍɍ Ŧŧ Ʉʉ Ɏɏ Ƶƶ Ꝥꝥ


From the Ancient Greek capital letter Δ.

(mathematics, physics) The Laplace operator.


mₑ

(physics) the electron mass, 9.109×10⁻³¹ kg


ά

(electrical engineering) Temperature coefficient of resistance.


An

(chemistry, physics, dated) actinon; ²¹⁹₈₆Rn (radon-219); an isotope of radon


(engineering, physics) The mho (unit of conductance)


ϖ

(fluid dynamics) angular frequency of a wave


Vss

field-effect transistor
field-effect transistor

(electronics) voltage source source — a terminal on an FET (field-effect transistor) circuit (in an nMOS MOSFET, this is used as the drain, connected to ground)


◌̅ (English name overbar or overline or overscore or vinculum)

overbar (English name)
overline (English name)
overscore (English name)
vinculum (English name)

p (proton); p̅ (antiproton)


Var

(physics, electrics) Alternative form of VAR


(mathematics, physics) the symbol indicating a vector product a.k.a. cross product


H⁰

Dem Graviton (hypothetisches, masseloses Austauschteilchen der Gravitations-WW [Wechselwirkungen] mit SpinQZ s=2), dem Photon der elektromagnetischen WW, den Eichbosonen W⁺, W⁻, Z⁰ und dem Higgs-Boson H⁰ der schwachen WW, sowie den 8 Gluonen der starken WW.

2016 December 19, Wolfgang Pfeiler, Quanten, Atome, Kerne, Teilchen (De Gruyter Studium) (in German), Walter de Gruyter GmbH & Co KG, page 392

(please add an English translation of this quotation)


kVAr

(physics, electrics) Alternative letter-case form of kVAR


(electricity) Temperature control switch.


(mathematics, physics) A vector pointing out of the page.


(chemistry, physics) an electron orbital type


(mathematics, physics) A double back prime. Used i.a. to mark the Riesz potential, e.g. ⟨s‶(x)⟩.


Since deformation manifests itself as a change in the metric characteristics of continuum, in the theory of finite deformations, it is then necessary to compare the referential ‵g_(ασ) and the convective g_(ασ) metrics. We systematically employ Latin indices in order to refer to spatial components of geometrical objects, whereas Greek indices to point on convective components (only a few instances can be found in the present study) or referential components (additionally, root symbol is sometimes supplied by backprime).

2023, Yuri N. Radayev, “Two-Point Rotations in Geometry of Finite Deformations”, in Holm Altenbach, Suren Manuk Mkhitaryan, Vahram Hakobyan, Avetik Varazdat Sahakyan, editors, Solid Mechanics, Theory of Elasticity and Creep (Advanced Structured Materials), Cham: Springer, page 276


Tn

(chemistry, physics) thoron; ²²⁰₈₆Rn (radon-220); an isotope of radon


(electrochemistry, electronics, electrical) Alternative form of 18650


(electrochemistry, electronics, electrical) Alternative form of 4680


46 + 80. From the dimensions of the electrochemical cell package, 46-millimetres in diameter and 80-millimeters tall.

(electrochemistry, electronics, electrical) A cylindrical rechargeable battery cell format for lithium-ion chemistry batteries


²³⁵U

(physics) The chemical formula for the uranium isotope uranium-235, which is used in nuclear fission.


²³⁸U

(physics) The chemical symbol for uranium-238, the most common isotope of uranium.


a⃗ + (-a⃗) = 0

(linear algebra, physics) Denotes a vector quantity.


ZeV

English: zevatron

(physics) zettaelectronvolt / zetta-electron-volt / zetta-electronvolt, 10⁺²¹ eV.


(linear algebra, physics) Denotes a tensor quantity.