noscitur a sociis

Main Entry: no·sci·tur a so·ci·is
Pronunciation: 'nO-si-t&r-"A-'sO-sE-y&s, 'nO-skE-"tur-"ä-'sO-kE-"Es
Function: noun
Etymology: Latin, it is known by its associates
: a doctrine or rule of construction: the meaning of an unclear or ambiguous word (as in a statute or contract) should be determined by considering the words with which it is associated in the context