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Melanin is derived from the Greek word melas, meaning black, and it is a pigment found in most organisms. For both color morphs, melanin usually masks the mandible color within a few weeks of fledging (Grant and Grant 1989).
home / medterms medical dictionary a-z list / pigmentation definition Medical Definition of Pigmentation Pigmentation: The coloring of the skin, hair, mucous membranes, and retina of the eye. Pigmentation is due to the deposition of the pigment melanin, which is produced by specialized cells called melanocytes. Other pigment-related terms include hyperpigmentation (too much pigment), hypopigmentation and underpigmentation (too little pigment), and depigmentation (loss of pigment).