micron

The definition of a micron is a linear measurement equal to one millionth of a meter.

(noun)

An example of a micron is the unit of measure represented with the symbol "um."

See micron in Webster's New World College Dictionary

noun pl. microns or micra

a unit of linear measure equal to one millionth of a meter, or one thousandth of a millimeter; micrometer: symbol, μm

Origin: ModL < Gr mikron, neut. of mikros, small, minute: see mica

See micron in American Heritage Dictionary 4

also mi·kron

noun pl. mi·crons or mi·cra (-krə) also mi·krons or mi·kra (-krə)

A unit of length equal to one millionth (10^-6) of a meter. No longer in technical use.

Origin:

Origin: From Greek mīkron

Origin: , neuter of mīkros, small

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