[pro.bos.cis] n, pl -bos.cis.es also -bos.ci.des [L, fr. Gk proboskis, fr. pro- + boskein to feed] (1576) 1 a: the trunk of an elephant; also: any long flexible snout b: the human nose esp. when prominent
2: any of various elongated or extensible tubular processes (as the sucking organ of a butterfly) of the oral region of an invertebrate