noun Surgery.
a sharp-pointed instrument enclosed in a cannula, used for withdrawing fluid from a cavity, as the abdominal cavity.

1700–10; earlier trocart < French, literally, three-sided, equivalent to tro- (variant of trois three) + cart, variant of carre side < Latin quadra something square Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
trocar (ˈtrəʊkɑː)
a surgical instrument for removing fluid from bodily cavities, consisting of a puncturing device situated inside a tube
[C18: from French trocart literally: with three sides, from trois three + carre side]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

trocar tro·car (trō'kär')
A sharp-pointed surgical instrument, used with a cannula to puncture a body cavity for fluid aspiration.

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