keratin

[ ker-uh-tin ]

/ ˈkɛr ə tɪn /

noun

a fibrous, structural protein that is the principal constituent of hoofs, nails, claws, talons, bills, horn, hair, feathers, etc., and that is found in the outermost layers of skin.

Origin of keratin

First recorded in 1840–50; kerat- + -in²

Words nearby keratin

keratalgia, keratan sulfate, keratectasia, keratectomy, keratic, keratin, keratinase, keratinization, keratinize, keratinocyte, keratinosome

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for keratin

Rhino horns are made of keratin, the same protein found in our fingernails.
‘Zoobiquity’: What Animals Can Teach Us About Our Health|Carl Zimmer|June 17, 2012|DAILY BEAST
Keratin, a substance forming the chief constituent in the hair, nails, and horn of animals.
The Nuttall Encyclopaedia|Edited by Rev. James Wood
Keratin is particularly rich in sulphur, and is quite insoluble in cold water.
Principles and Practice of Fur Dressing and Fur Dyeing|William E. Austin

British Dictionary definitions for keratin

keratin

ceratin

/ (ˈkɛrətɪn) /

noun

a fibrous protein that occurs in the outer layer of the skin and in hair, nails, feathers, hooves, etc

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for keratin

keratin

[ kĕr′ə-tĭn ]

n.

Any of a group of scleroproteins or albuminoids that contain large amounts of sulfur and are the chief structural constituents of hair, nails, and other horny tissues.

Scientific definitions for keratin

keratin

[ kĕr′ə-tĭn ]

Any of a class of tough, fibrous proteins that are the main structural component of hair, nails, horns, feathers, and hooves. Keratins are rich in sulfur-containing amino acids, especially cysteine. Individual keratin molecules are entwined helically around each other in long filaments, which are cross-linked by bonds between sulfur atoms on different chains. The twining and cross-linking produce strength and toughness.

单词	keratin
释义	keratin [ ker-uh-tin ] / ˈkɛr ə tɪn / noun a fibrous, structural protein that is the principal constituent of hoofs, nails, claws, talons, bills, horn, hair, feathers, etc., and that is found in the outermost layers of skin. Origin of keratin First recorded in 1840–50; kerat- + -in² Words nearby keratin keratalgia, keratan sulfate, keratectasia, keratectomy, keratic, keratin, keratinase, keratinization, keratinize, keratinocyte, keratinosome Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for keratin Rhino horns are made of keratin, the same protein found in our fingernails. ‘Zoobiquity’: What Animals Can Teach Us About Our Health\|Carl Zimmer\|June 17, 2012\|DAILY BEAST Keratin, a substance forming the chief constituent in the hair, nails, and horn of animals. The Nuttall Encyclopaedia\|Edited by Rev. James Wood Keratin is particularly rich in sulphur, and is quite insoluble in cold water. Principles and Practice of Fur Dressing and Fur Dyeing\|William E. Austin British Dictionary definitions for keratin keratin ceratin / (ˈkɛrətɪn) / noun a fibrous protein that occurs in the outer layer of the skin and in hair, nails, feathers, hooves, etc Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for keratin keratin [ kĕr′ə-tĭn ] n. Any of a group of scleroproteins or albuminoids that contain large amounts of sulfur and are the chief structural constituents of hair, nails, and other horny tissues. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for keratin keratin [ kĕr′ə-tĭn ] Any of a class of tough, fibrous proteins that are the main structural component of hair, nails, horns, feathers, and hooves. Keratins are rich in sulfur-containing amino acids, especially cysteine. Individual keratin molecules are entwined helically around each other in long filaments, which are cross-linked by bonds between sulfur atoms on different chains. The twining and cross-linking produce strength and toughness. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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