achromatism

2 definitions found

achromatism - Collaborative International Dictionary of English v.0.48 :

  Achromatism \A*chro"ma*tism\, n. [Cf. F. achromatisme.]
     The state or quality of being achromatic; as, the achromatism
     of a lens; achromaticity. --Nichol.
     [1913 Webster]

achromatism - WordNet (r) 2.1 (2005) :

  achromatism
      n 1: the visual property of being without chromatic color [syn:
           colorlessness, colourlessness, achromatism,
           achromaticity] [ant: color, coloring, colour,
           colouring]