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n. Plural form of compass.

n. An instrument for describing circles, measuring figures, etc., consisting of two, or (rarely) more, pointed branches, or legs, usually joined at the top by a rivet on which they move.

n.

"Verbal testimony connected his great poem of farewell and consolation, for example, “A Valediction: Forbidding Mourning” (with its famous image of the couple as “stiffe twin compasses”) with Donne’s departure for France in 1611."

caliper compasses   

compass