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Noun porta has 1 sense
  1. orifice, opening, porta - an aperture or hole opening into a bodily cavity; "the orifice into the aorta from the lower left chamber of the heart"
    --1 is a kind of passage, passageway
    --1 has particulars:
     vent; blastopore; aortic orifice; stoma; porta hepatis; spiracle; mouth; os; cervix, uterine cervix, cervix uteri; fenestra; cardia; introitus; urethral orifice, external orifice; pylorus; anus, arse, arsehole, asshole; fontanelle, fontanel, soft spot; naris; rima
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