Definition of stylet in English:


Syllabification: sty·let
Pronunciation: /stīˈlet, ˈstīlit


1 Medicine A slender probe.
1.1A wire or piece of plastic run through a catheter or cannula in order to stiffen it or to clear it.
More example sentences
  • I can still clean the blood from an infusion needle with a wire stylet, sharpen it on an Arkansas stone, check for barbs using a cotton ball, and re-sterilize it.
  • If the patient demonstrates an anal bellows or great toe flexion, this confirms the location of S3, and the surgeon removes the stylet of the foramen needle.
  • After insertion of the needle into the lymph node, the stylet was removed.
2 Zoology (In an invertebrate) a small style, especially a piercing mouthpart of an insect.
More example sentences
  • PPV is transmitted by aphids - small, teardrop-shaped insects with a sharp mouthpart called a stylet for sucking out plant sap.
  • Mites damage ferns by puncturing the edges of fern fronds with their tube-like stylets and other mouthparts, sucking up the nutritious contents of frond cells.
  • The salivary glands, stylets, and sucking pharynx are known as the buccal apparatus.


late 17th century: from French stilet, from Italian stiletto (see stiletto).

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