Orifice
Pronunciation : Or"i*fice
Part of Speech : n.
Etymology : [F., from L. orificium; os, oris, a mouth + facere to make. See Oral, and Fact.]
Definition : Defn: A mouth or aperture, as of a tube, pipe, etc.; an opening; as, the orifice of an artery or vein; the orifice of a wound. Shak. Etna was bored through the top with a monstrous orifice. Addison.
Source : Webster's Unabridged Dictionary, 1913