'set-in sleeve' definitions:

Definition of 'set-in sleeve'

From: GCIDE

set-in sleeve \set"-in sleeve`\ (s[e^]t"[i^]n sl[=e]v`), n. A sleeve joined to the body of a garment by a seam starting at the edge of the shoulder and continuing around the armhole. Contrasted to a raglan sleeve. [PJC]