micrometer


micrometer

noun

  1. any of various devices for measuring minute distances, angles, etc., as in connection with a telescope or microscope.
  2. Also called mike. micrometer caliper. a precision instrument with a spindle moved by a finely threaded screw, for the measurement of thicknesses and short lengths, commonly used by machinists for turning shafts or boring holes.

noun

  1. micron(def 1).

noun

  1. any of various instruments or devices for the accurate measurement of distances or angles
  2. Also called: micrometer gauge, micrometer calliper a type of gauge for the accurate measurement of small distances, thicknesses, diameters, etc. The gap between its measuring faces is adjusted by a fine screw, the rotation of the screw giving a sensitive measure of the distance moved by the face

n.1660s, from micro- + -meter. Originally a telescope attachment; from 1884 as a craftsman’s fine measuring tool. Related: Micrometry; micrometric.

  1. A device for measuring very small distances, angles, or objects, especially one based on the rotation of a finely threaded screw, as in relation to a microscope.

  1. A unit of length in the metric system equal to one millionth (10-6) of a meter. Also called micron

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