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单词 keratin
释义

WordReference Random House Learner's Dictionary of American English © 2024
ker•a•tin /ˈkɛrətɪn/USA pronunciation   n. [uncountable]
  1. Biochemistrya tough protein that is the main part of hair, nails, horn, hoofs, etc., and of the outermost layer of skin.

WordReference Random House Unabridged Dictionary of American English © 2024
ker•a•tin  (ker′ə tin),USA pronunciation n. 
  1. Biochemistrya scleroprotein or albuminoid substance, found in the dead outer skin layer, and in horn, hair, feathers, hoofs, nails, claws, bills, etc.
  • kerat- + -in2 1840–50

Collins Concise English Dictionary © HarperCollins Publishers::
keratin /ˈkɛrətɪn/, ceratin n
  1. a fibrous protein that occurs in the outer layer of the skin and in hair, nails, feathers, hooves, etc
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更新时间：2025/2/23 11:36:29