Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A dark brown pigment related to melanin

Etymologies

Sorry, no etymologies found.

Examples

  • Melanin comes in TWO delicious flavours: eumelanin, which is dark brown or black, and pheomelanin, which is reddish yellow.

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  • Skin tone is created by special cells that produce different types of melanin, such as eumelanin, which are naturally occurring pigments that absorb ultraviolet radiation and release it as heat, protecting the body from its harmful effects.

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  • Your exact hair colour is determined by how much of two pigments, eumelanin and phomelanin, are present.

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  • The genes that code for lots of eumelanin and not much phomelanin are generally dominant, and so the default for humans around the world is brown hair (and brown eyes, for much the same reason).

    What's up (scientifically) with hair?

  • Your hair colour is basically determined by how much of two pigments, eumelanin and phomelanin, you have in your hair.

    What's up (scientifically) with hair?

  • Ali, who trains blacks in a new science he developed that teaches them how they can use their 'distinctive' eumelanin to reradiate ultraviolet light and focus it on whites for the purpose of giving whites skin cancers carcinomas, sarcomas and melanomas, visited Cincinnati to champion Webster and to institute a branch of his science here in the city.

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  • Importantly, phaeomelanin is much more stable to environmental conditions than eumelanin, hence the reactions occurring in the burial environment favor the preservation of phaeomelanin, revealing and enhancing the red/yellow color of hairs containing this pigment.

    Interactive Dig Hierakonpolis - Archaeological Hair

  • All hair contains a mixture in varying concentration of both black-brown eumelanin and red-yellow phaeomelanin pigments, which are susceptible to differential chemical change under certain extreme burial conditions (for example wet reducing conditions, or dry oxidising conditions).

    Interactive Dig Hierakonpolis - Archaeological Hair

  • You can tell just by looking at your friend that she has high levels of pheomelanin and relatively low levels of the pigment eumelanin.

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  • These and most studies on animal pigmentation to date have focused on the melanin system, in which specialized cells known as melanocytes produce either of two pigments-eumelanin or pheomelanin-resulting in different tone and colour of skin, hair and feathers.

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