# Definitions and Synonyms of *constant of proportionality* | Another word for *constant of proportionality* | What is *constant of proportionality? *

*Definition 1: the constant value of the ratio of two proportional quantities x and y; usually written y = kx, where k is the factor of proportionality - [noun denoting quantity]*

*Synonyms for constant of proportionality in the sense of this definition*

*(**constant of proportionality* is a kind of ...) a number representing a quantity assumed to have a fixed value in a specified mathematical context

*constant of proportionality*is a kind of ...) a number representing a quantity assumed to have a fixed value in a specified mathematical context

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*"the velocity of light is a constant"*### (*constant of proportionality* is a kind of ...) any of the numbers (or symbols) that form a product when multiplied together

### (... is a kind of *constant of proportionality* ) the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second

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