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2 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Cal·i·pers n. pl.  An instrument, usually resembling a pair of dividers or compasses with curved legs, for measuring the diameter or thickness of bodies, as of work shaped in a lathe or planer, timber, masts, shot, etc.; or the bore of firearms, tubes, etc.; -- called also caliper compasses, or caliber compasses.
 Caliper square, a draughtsman's or mechanic's square, having a graduated bar and adjustable jaw or jaws. --Knight.
 Vernier calipers. See Vernier.
 

From: Webster's Revised Unabridged Dictionary (1913)

 Com·pass·es n., pl. 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.
 Note:The compasses for drawing circles have adjustable pen points, pencil points, etc.; those used for measuring without adjustable points are generally called dividers. See Dividers.
 Bow compasses. See Bow-compass.
 Caliber compasses, Caliper compasses. See Calipers.
 Proportional, Triangular, etc., compasses. See under Proportional, etc.