stylet

[stahy-lit]
noun
1.
a stiletto or dagger.
2.
any similar sharp-pointed instrument.
3.
Medicine/Medical.
a.
a probe.
b.
a wire run through the length of a catheter, cannula, or needle to make it rigid or to clear it.

Origin:
1690–1700; < French < Middle French stilet < Italian stiletto stiletto; -y- < Latin stylus. See style, stylus

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World English Dictionary
stylet (ˈstaɪlɪt)
 
n
1.  surgery
 a.  a wire for insertion into a flexible cannula or catheter to maintain its rigidity or patency during passage
 b.  a slender probe
2.  zoology any small pointed bristle-like part
 
[C17: from French stilet, from Old Italian stiletto; influenced in spelling by Latin stylusstyle]

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

stylet sty·let (stī-lět', stī'lĭt)
n.

  1. A fine wire that is run through a catheter, cannula, or hollow needle to keep it stiff or clear of debris.

  2. A slender surgical probe. Also called stylus.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Stylet strong, with prominent knobs sloping posteriorly.
Results showed the presence of the stylet within the sieve tubes.
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