bow compass

[ boh ]
/ boʊ /

noun

any of several types of compasses having the legs joined by a bow-shaped piece.

Origin of bow compass

First recorded in 1790–1800

British Dictionary definitions for bow compass

bow compass
/ (bəʊ) /

noun

a compass for drawing, in which the legs are joined by a flexible metal bow-shaped spring rather than a hinge, the angle being adjusted by a screw Also called: bow-spring compass