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From The Collaborative International Dictionary of English v.0.44 [gcide]: Micromillimeter \Mi'cro*mil"li*me'ter\, noun [Micro- + millimeter.] The millionth part of a meter. Note: The millionth part of a meter is now termed a {micron}, and the word micromillimeter does not conform to the IS use of the prefix {micro-}. [1913 Webster +PJC] From WordNet (r) 2.0 [wn]: noun 1: a metric unit of length equal to one billionth of a meter [syn: {nanometer}, {nanometre}, {nm}, {millimicron}, {micromillimetre}] |
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