orifice(redirected from orifice of pulmonary trunk)
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An opening, especially to a cavity or passage of the body; a mouth or vent.
[Middle English, from Old French, from Late Latin ōrificium : Latin ōs, ōr-, mouth; see ōs- in Indo-European roots + Latin -ficium, a making, doing (from facere, to make; see dhē- in Indo-European roots).]
or′i·fi′cial (-fĭsh′əl) adj.
chiefly Technical an opening or mouth into a cavity; vent; aperture
[C16: via French from Late Latin ōrificium, from Latin ōs mouth + facere to make]
or•i•fice(ˈɔr ə fɪs, ˈɒr-)
an opening or aperture, as of a tube or pipe; a mouthlike opening or hole; mouth; vent.
[1535–45; < Middle French < Latin ōrificium=ōr- (s. of ōs) mouth + -fic-, comb. form of facere to make, do1]
or`i•fi′cial (-ˈfɪʃ əl) adj.
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|Noun||1.||orifice - an aperture or hole that opens into a bodily cavity; "the orifice into the aorta from the lower left chamber of the heart"|
vent - external opening of urinary or genital system of a lower vertebrate
blastopore - the opening into the archenteron
aortic orifice - the orifice from the lower left chamber of the heart to the aorta
stoma - a mouth or mouthlike opening (especially one created by surgery on the surface of the body to create an opening to an internal organ)
passageway, passage - a path or channel or duct through or along which something may pass; "the nasal passages"
porta hepatis - opening for major blood vessels to enter and leave the liver
spiracle - a breathing orifice
mouth - the externally visible part of the oral cavity on the face and the system of organs surrounding the opening; "she wiped lipstick from her mouth"
os - a mouth or mouthlike opening
fenestra - a small opening covered with membrane (especially one in the bone between the middle and inner ear)
cardia - the opening into the stomach and that part of the stomach connected to the esophagus
introitus - entrance or opening to a hollow organ or tube (especially the vaginal opening); "the introitus of the vagina"
pylorus - a small circular opening between the stomach and the duodenum
anus - the excretory opening at the end of the alimentary canal
fontanel, fontanelle, soft spot - any membranous gap between the bones of the cranium in an infant or fetus
naris - any of the openings to the nasal cavities that allow air to flow through the cavities to the pharynx
rima - a narrow elongated opening or fissure between two symmetrical parts