micrometer 1
/muy krom"i teuhr/ , n.
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.
Also, esp. Brit., micrometre .
[ 1660-70; MICRO- + -METER ]
micrometer 2
/muy"kroh mee'teuhr/ , n.
micron (def. 1).
[ MICRO- + METER 1 ]