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coefficient

 
/ˌkoʊ·ɪˈfɪʃ·ənt/ n [C]

Definition

mathematics a number or symbol that is written in front of and multiplies another number or symbol chemistry A coefficient is also a number that is used to measure the characteristics of a substance. coefficient of friction physics The coefficient of friction is a measure of how easily one object slides across the surface of another, calculated by the force that is being used and the amount of friction.
(Definition of coefficient n from the Cambridge Academic Content Dictionary © Cambridge University Press)

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