单词 | micron |
释义 | micron /muy"kron/, n. , pl. microns, micra /-kreuh/. 1. Also called micrometer. the millionth part of a meter. Symbol: µ, mu 2. Physical Chem. 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. Also, mikron. [1880-85; < Gk mikrón a little, n. use of neut. sing. of mikrós small; see -ON1] |
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