from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An instrument consisting essentially of two curved hinged legs, used to measure thickness and distances. Often used in the plural.
  • n. A large instrument having a fixed and a movable arm on a graduated stock, used for measuring the diameters of logs and similar objects.
  • n. A vernier caliper.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Uncommon variant of calipers.
  • n. The part of a disc brake that holds the brake pads.

from The Century Dictionary and Cyclopedia

  • To ascertain the diameter of (any cylindrical body) by means of calipers, or by a star-gage: as, to culiper a gun.
  • n. An instrument for measuring diameters; a caliber: commonly in the plural.
  • n. In forestry, an instrument for measuring the diameter of trees or logs.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. an instrument for measuring the distance between two points (often used in the plural)
  • v. measure the diameter of something with calipers


Alteration of caliber.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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  • The thickness of a sheet of paper or card stock. Traditionally measured in points (thousandths of an inch), caliper is now measured in microns (micrometers).

    November 6, 2007