orifice

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orifice

 [or´ĭ-fis]
1. the entrance or outlet of any body cavity.
2. any opening or meatus. adj., adj orific´ial.
aortic orifice the opening of the left ventricle into the aorta; called also aortic opening.
external urethral orifice urinary meatus.
internal urethral orifice the opening from the urinary bladder into the urethra at one corner of the trigone of the bladder.
left atrioventricular orifice (mitral orifice) the opening between the left atrium and ventricle of the heart.
pulmonary orifice (orifice of pulmonary trunk) the opening between the pulmonary trunk and the right ventricle of the heart; called also opening of pulmonary trunk.
right atrioventricular orifice (tricuspid orifice) the opening between the right atrium and ventricle of the heart.
ureteral orifice the opening of a ureter into the urinary bladder at one corner of the trigone of the bladder. Called also ureteral meatus.

or·i·fice

(or'i-fis), [TA] Avoid the mispronunciation or'ĭ-fĭ-sēz of the plural of this word.
Any aperture or opening.
See also: aperture, opening, os, ostium, meatus.
Synonym(s): orificium [TA]
[L. orificium]

orifice

(ôr′ə-fĭs, ŏr′-)
n.
An opening, especially to a cavity or passage of the body; a mouth or vent.

or′i·fi′cial (-fĭsh′əl) adj.

or·i·fice

(ōr'i-fis) [TA]
Any aperture or opening.
Synonym(s): orificium.
[L. orificium]

orifice

any opening or aperture.

or·i·fice

(ōr'i-fis) [TA]
Any aperture or opening.
[L. orificium]