Micromillimeter

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Micromillimeter \Mi`cro*mil"li*me`ter\, n. [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]:

  micromillimeter
       n : a metric unit of length equal to one billionth of a meter
           [syn: {nanometer}, {nanometre}, {nm}, {millimicron}, {micromillimetre}]