Noun
A black pigment found in the pigment-bearing cells of the skin (particularly in the skin of the negro), in the epithelial cells of the external layer of the retina (then called fuscin), in the outer layer of the choroid, and elsewhere. It is supposed to be derived from the decomposition of hemoglobin.
Source: Webster's dictionaryI am just mystified by these people telling me I would think Obama was doing a great job if his skin contained less melanin. Jonah Goldberg
A common example of these include: ink from tattoos and freckles (melanin) in skin samples. Source: Internet
A form of melanin makes up the ink used by many cephalopods (see cephalopod ink ) as a defense mechanism against predators. Source: Internet
A dilute solution of potassium permanganate is an effective melanin bleach. Source: Internet
All forms of albinism involve abnormal production and/or deposition of melanin. Source: Internet
Both pheomelanin and eumelanin are found in human skin and hair, but eumelanin is the most abundant melanin in humans, as well as the form most likely to be deficient in albinism. Source: Internet