A surgical knife is a sharp instrument used in medical procedures. The term can refer to a variety of tools, including a bistoury (8 letters), which is a curved blade used for cutting through tissue; a catling (7 letters), which is a double-edged knife with a handle; a SCALPEL (7 letters), which is a small, sharp knife used for delicate operations; a LANCET (6 letters), which is a small, pointed blade used for making incisions; a LANCE (5 letters), which is a long, thin blade used for piercing; and a catlin (6 letters), which is a short, pointed blade used for cutting.