Millimeter vs. Micron

Millimeter and Micron Definitions
Millimeter
A unit of length equal to one thousandth (10-3) of a meter, or 0.0394 inch. See Table at measurement.
Micron
A unit of length equal to one thousandth (10-3) of a millimeter or one millionth (10-6) of a meter. Also called micrometer.
Millimeter
Alternative spelling of millimetre
Micron
(physics) The thousandth part of one millimeter; the millionth part of a meter.
Millimeter
A lineal measure in the metric system, containing the thousandth part of a meter; equal to .03937 of an inch. See 3d Meter.
Micron
(figurative) A very tiny amount.
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Millimeter
A metric unit of length equal to one thousandth of a meter
Micron
(linguistics) breve
Micron
A measure of length; the thousandth part of one millimeter; the millionth part of a meter.
Micron
A metric unit of length equal to one millionth of a meter