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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

abstraction, abstract entity go
a general concept formed by extracting common features from specific examples

measure, quantity, amount go
how much there is or how many there are of something that you can quantify

definite quantity go
a specific measure of amount

number go
a concept of quantity involving zero and units

constant
a number representing a quantity assumed to have a fixed value in a specified mathematical context

noun.quantity

11 Subcategories

Avogadro's number, Avogadro number go
the number of molecules in a mole of a substance (approximately 602,250,000,000,000,000,000,000)
Boltzmann's constant go
constant used in the calculation of the ideal gas constant
coefficient go
a constant number that serves as a measure of some property or characteristic
cosmological constant go
an arbitrary constant in the equations of general relativity theory
equilibrium constant go
(chemistry) the ratio of concentrations when equilibrium is reached in a reversible reaction (when the rate of the forward reaction equals the rate of the reverse reaction)
R, gas constant, universal gas constant go
(physics) the universal constant in the gas equation: pressure times volume = R times temperature
G, gravitational constant, universal gravitational constant, constant of gravitation go
(physics) the universal constant relating force to mass and distance in Newton's law of gravitation
Hubble's constant, Hubble constant, Hubble's parameter, Hubble parameter go
(cosmology) the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer
ionic charge go
the charge on an ion is equal to a constant charge e multiplied by an integer from 1 to 15
factor of proportionality, constant of proportionality go
the constant value of the ratio of two proportional quantities x and y
c, speed of light, light speed go
the speed at which light travels in a vacuum