From The Collaborative International Dictionary of English v.0.44 [gcide]:
Porta \Por"ta\, noun; pl. {Port[ae]}. [L., a gate. See {Port} a hole.] (Anat.) (a) The part of the liver or other organ where its vessels and nerves enter; the hilus. (b) The foramen of Monro. --B. G. Wilder.
From WordNet (r) 2.0 [wn]:
noun
1: an aperture or hole opening into a bodily cavity; "the orifice into the aorta from the lower left chamber of the heart" [syn: {orifice}, {opening}]
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