WordNet: opening, orifice, porta

an aperture or hole that opens into a bodily cavity; "the orifice into the aorta from the lower left chamber of the heart"

• hypernym passage, passageway

• hyponym vent

• hyponym blastopore

• hyponym aortic orifice

• hyponym stoma

• hyponym porta hepatis

• hyponym spiracle

• hyponym mouth

• hyponym os

• hyponym cervix, cervix uteri, uterine cervix

• hyponym fenestra

• hyponym cardia

• hyponym introitus

• hyponym external orifice, urethral orifice

• hyponym pylorus

• hyponym anus

• hyponym fontanel, fontanelle, soft spot

• hyponym naris

• hyponym rima

opening

• (englanti) open (derivationally related)

• (englanti) open (derivationally related)
• (suomi) aukko (synonyymi)

orifice

• (suomi) suu (synonyymi)

• (suomi) reikä (synonyymi)

porta

• (suomi) portti (synonyymi)