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millimicron

[ mil-uh-mahy-kron ]

noun

, plural mil·li·mi·crons, mil·li·mi·cra [mil, -, uh, -mahy-kr, uh].
  1. a unit of length equal to one thousandth of a micron; one-billionth of a meter. :


millimicron

/ ˈmɪlɪˌmaɪkrɒn /

noun

  1. an obsolete name for a nanometre; one millionth of a millimetre
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of millimicron1

First recorded in 1900–05; milli- + micron

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millimetremillimole