The Collaborative International Dictionary of English v.0.48:
Pubis \Pu"bis\ (p[=u]"b[i^]s), n. [NL. See Pubes.] (Anat.) The ventral and anterior of the three principal bones composing either half of the pelvis; sharebone; pubic bone. [1913 Webster]WordNet (r) 3.0 (2006):
pubis n 1: one of the three sections of the hipbone; together these two bones form the front of the pelvis [syn: pubis, pubic bone, os pubis]