[mahy-krom-i-ter] 
| 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. |
[mahy-kron] [-kruh] . | 1. | Also called micrometer. the millionth part of a meter. Symbol: μ, mu |
| 2. | Physical Chemistry. a colloidal particle whose diameter is between 0.2 and 10 microns. |
| 3. | Physics. a very small unit of pressure, equal to that exerted by a column of mercury 1μ high. |
| mi·crom·e·ter 1 (mī-krŏm'ĭ-tər) n. A device for measuring very small distances, objects, or angles, especially one based on the rotation of a finely threaded screw, as in relation to a microscope. |
| mi·cro·me·ter 2 (mī'krō-mē'tər) n. A unit of length equal to one thousandth (10-3) of a millimeter or one millionth (10-6)of a meter. |
micrometer mi·crom·e·ter1 (mī-krŏm'ĭ-tər)
n.
A device for measuring very small distances, objects, or angles, especially one based on the rotation of a finely threaded screw, as in relation to a microscope.
micrometer mi·cro·me·ter2 (mī'krō-mē'tər)
n.
Abbr. μm A unit of length equal to one thousandth (10-3) of a millimeter or one millionth (10-6) of a meter. Also called micron.
micron mi·cron or mi·kron (mī'krŏn')
n. pl. mi·crons or mi·cra (-krə) or mi·krons or mi·kra (-krə)
Abbr. μm See micrometer.
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