WordNet (r) 3.0 (2006):
retroflection n 1: a turning or tilting backward of an organ or body part; "retroversion of the uterus" [syn: retroversion, retroflection, retroflexion] 2: an articulatory gesture made by turning the tip of the tongue back against the roof of the mouth [syn: retroflection, retroflexion] 3: the act of bending backward [syn: retroflection, retroflexion]