pubis

from 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}]

from 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]