orifice n : an aperture or hole opening into a bodily cavity; "the orifice into the aorta from the lower left chamber of the heart" [syn: opening, porta]
EtymologyMiddle English, from Old French, from Late Latin orificium, compound of os, mouth + -ficium.
- 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.
a mouth or aperture, as of a tube, pipe
An orifice is any opening, mouth, hole or vent, as of a pipe, plate, or a body.
aperture, broaching, cavity, chasm, check, clearing, cleft, crack, disclosure, fenestra, fistula, fontanel, foramen, gap, gape, gat, gulf, hiatus, hole, hollow, inlet, interval, lacuna, laying open, leak, opening, opening up, outlet, passageway, pore, slot, space, split, stoma, throwing open, uncorking, unstopping, vent, yawn