The Collaborative International Dictionary of English v.0.48:
Inguen \In"guen\, n. [L. inguen, inguinis.] (Anat.) The groin. [1913 Webster]WordNet (r) 3.0 (2006):
inguen n 1: the crease at the junction of the inner part of the thigh with the trunk together with the adjacent region and often including the external genitals [syn: groin, inguen]