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ostium

 - 4 dictionary results
Stevens Metallurgical
We Supply EM Grade Osmium Tetroxide.
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os⋅ti⋅um

  [os-tee-uhm]
Use ostium in a Sentence
–noun, plural -ti⋅a  [-tee-uh] .
1. Anatomy, Zoology. a small opening or orifice, as at the end of the oviduct.
2. Zoology. one of the tiny holes in the body of a sponge.
Origin:
1655–65; < L ōstium entrance, river mouth
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Stevens Metallurgical
We Supply EM Grade Osmium Tetroxide.
stevensmetallurgical.com
os·ti·um   (ŏs'tē-əm)   
n.   pl. os·ti·a (-tē-ə)

  1. A small opening or orifice, as in a body organ or passage.

  2. Any of the small openings or pores in a sponge.


[Latin ōstium, door, opening, from ōs, mouth; see ōs- in Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: os·ti·um
Pronunciation: 'äs-tE-&m
Function: noun
Inflected Form: plural os·tia /-tE-&/
: a mouthlike opening in a bodily part (as a fallopian tube or a blood vessel) ostia due to syphilis —R. L. Cecil & R. F. Loeb>
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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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.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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