Dictionary

ostium

noun os·ti·um \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
Medical Dictionary

ostium

noun os·ti·um \ˈäs-tē-əm\
plural os·tia \-tē-ə\

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>

Browse

2 ENTRIES FOUND:
Next Word in the Dictionary: ostlerPrevious Word in the Dictionary: ostioleAll Words Near: ostium
July 03, 2015
interpellate Hear it
to formally question a public official
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears