lancet

[lan-sit, lahn-] /ˈlæn sɪt, ˈlɑn-/
noun
1.
a small surgical instrument, usually sharp-pointed and two-edged, for making small incisions, opening abscesses, etc.
2.
Architecture.
  1. a lancet arch.
  2. a lancet window.
Origin
1375-1425; late Middle English lancette < Middle French. See lance1, -et
Examples from the web for lancet
  • lancet always has good stuff, and there's the exercise industry don't laugh, they have people who understand physiology.
  • The lancelet resembles a lancet, a double-bladed surgical knife.
  • Along comes an ant, which swallows a slime ball loaded with hundreds of lancet flukes.
British Dictionary definitions for lancet

lancet

/ˈlɑːnsɪt/
noun
1.
Also called lance. a pointed surgical knife with two sharp edges
2.
short for lancet arch, lancet window
Word Origin
C15 lancette, from Old French: small lance
Word Origin and History for lancet
n.

late 14c., launcet, from Old French lancette "small lance" (12c.), diminutive of lance (see lance (n.)).

lancet in Medicine

lancet lan·cet (lān'sĭt)
n.
A surgical knife with a short, wide, pointed double-edged blade, used especially for making punctures and small incisions. Also called lance.