Meaning of CALIPERS in English
( 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.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012