ōrĭfĭcĭum — Lewis & Short
ōrĭfĭcĭum, ii, n.1. os-facio,
I an opening, orifice (post-class.):
ventris sunt duo orificia,Macr. S. 7, 4:
cistulae,App. M. 9, p. 236, 41; 11, p. 262, 27.