keratin, ceratin
(noun) a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves
Source: WordNet® 3.1
keratin (countable and uncountable, plural keratins)
(protein) The protein of which hair and nails are composed.
• Katrine, intaker, kreatin, tankier
Source: Wiktionary
Ker"a*tin, n. Etym: [Gr. (Physiol. Chem.)
Definition: A nitrogenous substance, or mixture of substances, containing sulphur in a loose state of combination, and forming the chemical basis of epidermal tissues, such as horn, hair, feathers, and the like. It is an insoluble substance, and, unlike elastin, is not dissolved even by gastric or pancreatic juice. By decomposition with sulphuric acid it yields leucin and tyrosin, as does albumin. Called also epidermose.
Source: Webster’s Unabridged Dictionary 1913 Edition
18 April 2025
(noun) the crease at the junction of the inner part of the thigh with the trunk together with the adjacent region and often including the external genitals
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