Interferometer

2 definitions found

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

  Interferometer \In`ter*fe*rom"e*ter\, n. [See {Interfere} and
     -meter.] (Physics)
     An instrument for measuring small movements, distances, or
     displacements by means of the interference of two beams of
     light; -- formerly also called also {refractometer}, but that
     word now has a different meaning.


     [Webster 1913 Suppl. +PJC]

From WordNet (r) 2.0 [wn]:

  interferometer
       n : any measuring instrument that uses interference patterns to
           make accurate measurements of waves