orifice Meaning, Definition & Usage

  1. noun an aperture or hole that opens into a bodily cavity
    porta; opening.
    • the orifice into the aorta from the lower left chamber of the heart

WordNet

Or"i*fice noun
Etymology
F., from L. orificium; os, oris, a mouth + facere to make. See Oral, and Fact.
Definitions
  1. 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.

Webster 1913