Etymology

Noun

1. A word used to link the subject of a sentence with a predicate (usually a subject complement or an adverbial); it serves to unite (or associate) the subject with the predicate. (e.g. be).
2. A function that represents the association between two or more variables, independent of the individual marginal distributions of the variables.
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     Related terms

     
     
     • couple
     • coupling
     • copular
     
     
     • copulate
     • copulation
     • copulative
     
     
     

     Etymology

     
     For coapula, from co- + apere ‘to bond’.from Arabic Koofl: meaning lock, and Possibly semitic כפל ‘doubled’.
     

     Noun

     
     
     
     1. A bond, tie, or other connecting item.