Lān'çet, n.

n. [Fr. lancette, dim. of lance; It. lancetta, Sp., Pg., & Pr. lanceta.]

1. A surgical instrument, sharp-pointed and two-edged, used in venesection, and in opening tumors, abscesses, &c.
2. (Arch.) A high and narrow window pointed like a lancet, often called a lancet window.