micrometer: Meaning and Definition of

mi•crom•e•ter

1. any of various devices for measuring minute distances, angles, etc., as in connection with a telescope or microscope.
2. Also calleda 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.

mi•cro•me•ter

1. micron (def. 1).