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English to English noun
| 1 |
an aperture or hole that opens into a bodily cavity |  | Example: the orifice into the aorta from the lower left chamber of the heart
source: wordnet30
| 2 |
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. | | source: webster1913
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