Medical term:
ostium
ostium
[os´te-um] (L.)an opening or orifice. adj., adj os´tial.
ostium abdomina´le the fimbriated end of the fallopian tube.
ostium cardi´acum the orifice between the esophagus and the stomach.
coronary ostium either of the two openings in the aortic sinuses that mark the origins of the left and right coronary arteries.
ostium inter´num ostium uterinum tubae.
ostium pharyn´geum the nasopharyngeal end of the eustachian tube.
ostium pri´mum an opening in the lower portion of the membrane dividing the embryonic heart into right and left sides. See also atrial septal defect and congenital heart defect.
ostium secun´dum an opening in the upper portion of the membrane dividing the embryonic heart into right and left sides, appearing later than the ostium primum. See also atrial septal defect and congenital heart defect.)
tympanic ostium (ostium tympa´nicum) the opening of the eustachian tube on the carotid wall of the tympanic cavity.
ostium u´teri the external opening of the cervix of the uterus into the vagina.
ostium uteri´num tu´bae the uterine end of the fallopian tube; the point where the cavity of the tube becomes continuous with that of the uterus.
ostium vagi´nae the external orifice of the vagina.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
os·ti·um
, pl.os·ti·a
(os'tē-ŭm, -ă), [TA]A small opening, especially one of entrance into a hollow organ or canal.
See also: orifice, opening, os, mouth (2).
See also: orifice, opening, os, mouth (2).
[L. door, entrance, mouth]
Farlex Partner Medical Dictionary © Farlex 2012
ostium
(ŏs′tē-əm)n. pl. os·tia (-tē-ə)
A small opening or orifice, as in a body organ or passage.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
ostium
Plural, ostia Medtalk An opening, apertureMcGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
os·ti·um
, pl. ostia (os'tē-ŭm, -ă) [TA]A small opening, especially one that enters into a hollow organ or canal.
[L. door, entrance, mouth]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
ostium
An opening or mouth.Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
ostium
any of numerous openings present in sponges through which water is drawn in.Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
os·ti·um
, pl. ostia (os'tē-ŭm, -ă) [TA]Small opening, especially one of entrance into a hollow organ or canal.
See also: orifice, mouth (2)
See also: orifice, mouth (2)
[L. door, entrance, mouth]
Medical Dictionary for the Dental Professions © Farlex 2012
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