DuckCorp Dico

Found 2 definitions

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

2.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   micron \mic"ron\, n. [NL., fr. Gr. mikro`s small.] (Physics)
      A measure of length; the thousandth part of one millimeter;
      the millionth part of a meter.
      [1913 Webster]