adjective Photography.

  1. representing correctly the relations of colors as found in a subject; isochromatic.
  2. (of an emulsion) sensitive to all visible colors except red; isochromatic.


  1. photog of or relating to an emulsion giving a rendering of relative light intensities of different colours that corresponds approximately to the colour sensitivity of the eye, esp one that is insensitive to red lightSometimes shortened to: ortho Compare panchromatic


  1. Staining with the same color as that of the dye used. Used of a cell or tissue.

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