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microgram
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micrometer (1)

mi·crom·e·ter [ mī krómmətər ] (plural mi·crom·e·ters)


noun 
Definition:
 
device for measuring small distances accurately: a device for measuring small diameters, thicknesses, distances, or angles to a high degree of accuracy

[Late 17th century. < French micromètre]

mi·cro·met·ric [ mkrō méttrik ] adjective
mi·crom·e·try noun
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