| pigmentation | 1. The deposition of colouring matter, the colouration or discolouration of a part by pigment. 2. Colouration, especially abnormally increased colouration, by melanin. (18 Nov 1997) |
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| arsenic pigmentation | Generalised but spotty increased melanin pigmentation of the skin in chronic arsenic poisoning. (05 Mar 2000) |
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| skin pigmentation | Colouration of the skin. (12 Dec 1998) |
| exogenous pigmentation | Discoloration of the skin or tissues by a pigment introduced from without. (05 Mar 2000) |