Webster's English Dictionary

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coefficient

co.ef.fi.cient \.ko--*-'fish-*nt\ n [NL coefficient-, coefficiens, fr. L 
   co- + efficient-,]efficiens efficient 1: any of the factors of a product 
   considered in relation to a specific fac tor 2a: a number that serves as a 
   measure of some property or characteristic (a s of a device or process) 2b: 
   MEASURE, DEGREE