Orifice \Or"i*fice\, n. [F., from L. orificium; os, oris, a mouth + facere to make. See Oral, and Fact.]

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 Revised Unabridged Dictionary (1913)