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3 definitions found
 for orifice
From The Collaborative International Dictionary of English v.0.48 :

  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.
     [1913 Webster]
           Etna was bored through the top with a monstrous
           orifice.                                 --Addison.
     [1913 Webster] Oriflamb

From WordNet (r) 3.0 (2006) :

      n 1: an aperture or hole that opens into a bodily cavity; "the
           orifice into the aorta from the lower left chamber of the
           heart" [syn: orifice, opening, porta]

From Moby Thesaurus II by Grady Ward, 1.0 :

  39 Moby Thesaurus words for "orifice":
     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

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