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ostia

[os-tee-uh; It. aw-styah]

noun

a town in central Italy, SW of Rome: ruins from 4th century b.c.; site of ancient port of Rome.

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noun, plural -ti·a

[-tee-uh] .

Anatomy, Zoology. a small opening or orifice, as at the end of the oviduct.

Zoology. one of the tiny holes in the body of a sponge.

Origin:
1655–65; < Latin ōstium entrance, river mouth

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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Collins

World English Dictionary

Ostia (ˈɒstɪə)

—n
	an ancient town in W central Italy, originally at the mouth of the Tiber but now about 6 km (4 miles) inland: served as the port of ancient Rome; harbours built by Claudius and Trajan; ruins excavated since 1854

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage

Medical Dictionary

ostium os·ti·um (ŏs'tē-əm)
n. pl. os·ti·a (-tē-ə)
A small opening or orifice, as in a body organ.

os'ti·al adj.

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ostia

Os·ti·a

os·ti·um