ostium
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About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.os·ti·um
noun \ˈäs-tē-əm\ plural os·tia \-tē-ə\
Definition of OSTIUM
: a mouthlike opening in a bodily part (as a fallopian tube or a blood vessel)
Origin of OSTIUM
New Latin, from Latin, door, mouth of a river; akin to Latin os mouth — more at oral
First Known Use: 1828
os·ti·um
noun \ˈäs-tē-əm\ (Medical Dictionary)plural ; os·tia \-tē-ə\ (audio pronunciation)
Medical Definition of OSTIUM
: a mouthlike opening in a bodily part (as a fallopian tube or a blood vessel) <stenosis of coronary ostia—R. L. Cecil & R. F. Loeb>
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