pigmentation

from WordNet (r) 3.0 (2006)

pigmentation
    n 1: the deposition of pigment in animals or plants or human
         beings
    2: coloration of living tissues by pigment [ant:
       {depigmentation}]

from The Collaborative International Dictionary of English v.0.48

Pigmentation \Pig`men*ta"tion\, n. (Physiol.)
   A deposition, esp. an excessive deposition, of coloring
   matter; as, pigmentation of the liver.
   [1913 Webster]

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