amniocentesis

[am-nee-oh-sen-tee-sis]
noun, plural amniocenteses [am-nee-oh-sen-tee-seez] .
a surgical procedure for obtaining a sample of amniotic fluid from the amniotic sac in the uterus of a pregnant woman by inserting a hollow needle through the abdominal wall, used in diagnosing certain genetic defects or possible obstetric complications.

Origin:
1955–60; amnio- (as combining form of amnion) + centesis

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To amniocentesis
Collins
World English Dictionary
amniocentesis (ˌæmnɪəʊsɛnˈtiːsɪs)
 
n , pl -ses
removal of some amniotic fluid by the insertion into the womb of a hollow needle, for therapeutic or diagnostic purposes
 
[C20: from amnion + centesis, from Greek kentēsis a puncture, from kentein to prick]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
Word Origin & History

amniocentesis
1958, Mod.L., from amnion (see amniotic) + centesis "surgical puncture," from Gk. kentesis "a pricking," from kentein "to prick," related to kontos "pole."
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
American Heritage
Medical Dictionary

amniocentesis am·ni·o·cen·te·sis (ām'nē-ō-sěn-tē'sĭs)
n. pl. am·ni·o·cen·te·ses (-sēz')
A procedure in which a small sample of amniotic fluid is drawn out of the uterus through a needle inserted in the abdomen and is then analyzed to detect genetic abnormalities in the fetus or to determine the sex of the fetus.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
amniocentesis   (ām'nē-ō-sěn-tē'sĭs)  Pronunciation Key 
A procedure usually done about the sixteenth week of pregnancy in which a small sample of amniotic fluid is drawn out of the uterus through a needle inserted in the abdomen. The fluid is analyzed to determine the gender of the fetus or the presence of genetic abnormalities.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
American Heritage
Cultural Dictionary
amniocentesis [(am-nee-oh-sen-tee-sis)]

A procedure for finding certain disorders in a fetus during pregnancy. In amniocentesis, a small amount of the salty liquid that surrounds the fetus in the amniotic sac is drawn out through a needle inserted into the mother's abdomen. The fluid generally contains some isolated cells from the fetus. These cells are analyzed to detect abnormalities in the chromosomes of the fetus, such as Down's syndrome, and may also be used to judge some other conditions, such as the maturity of the fetus's lungs.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Example sentences
But encouraging results from other tests, including amniocentesis and an electrocardiogram, allayed the family's fears.
Treatment may require repeated amniocentesis during pregnancy.
Related Words
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature
FAVORITES
RECENT

;