Source : Webster's Revised Unabridged Dictionary (1913)

Inguen \In"guen\, n. [L. inguen, inguinis.] (Anat.)
   The groin.

Source : WordNet®

inguen
     n : 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}]