- The coloring of the skin, hair, mucous membranes, and retina of the eye. Pigmentation is due to the deposition of melanin which is a coloring matter. The melanin is produced by specialized cells called melanocytes. Other pigmented terms include hyperpigmentation (too much pigment), hypopigmentation and underpigmentation (too little pigment), and depigmentation (loss of pigment).
* * *Coloration, either normal or pathologic, of the skin or tissues resulting from a deposit of pigment.
* * *pig·men·ta·tion .pig-mən-'tā-shən, -.men- n coloration with or deposition of pigment esp an excessive deposition of bodily pigment
* * *n.coloration produced in the body by the deposition of one pigment, especially in excessive amounts. Pigmentation may be produced by natural pigments, such as bile pigments (as in jaundice) or melanin, or by foreign material, such as lead or arsenic in chronic poisoning.
* * *pig·men·ta·tion (pig″mən-taґshən) 1. the deposition of pigment. 2. abnormal discoloration of a part by a pigment; see also dyschromia and hyperpigmentation.
Medical dictionary. 2011.