n. [ F. lancette, dim. of lance lance. See Lance. ] 1. A surgical knife-like instrument of various forms, commonly sharp-pointed and two-edged, used in venesection, and in opening abscesses, etc. [ 1913 Webster ]
2. (Metal.) An iron bar used for tapping a melting furnace. Knight. [ 1913 Webster ]
Lancet arch (Arch.), a pointed arch, of which the width, or span, is narrow compared with the height. -- Lancet architecture, a name given to a style of architecture, in which lancet arches are common; -- peculiar to England and 13th century. [ 1913 Webster ]