lancet

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.

noun

1. Also called: lance a pointed surgical knife with two sharp edges
2. short for lancet arch, lancet window

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

1. A surgical knife with a short, wide, pointed double-edged blade, used especially for making punctures and small incisions.lance