Definitions for ostiumˈɒs ti əm; -ti ə
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Random House Webster's College Dictionary
os•ti•umˈɒs ti əm; -ti ə(n.)(pl.)-ti•a
a small opening or orifice of the body.
Category: Anatomy, Zoology
Origin of ostium:
1655–65; < L ōstium entrance, river mouth
Wiktionary
ostium(Noun)
A small opening or orifice, as in a body organ or passage.
ostium(Noun)
Any of the small openings or pores in a sponge.
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