Dictionary Home »
Dictionary Definitions » keratin
keratin
(ker′ə tin)
noun
a tough, fibrous, insoluble protein forming the principal matter of hair, nails, horn, etc.
Origin: kerat(o)- + -in
Related Forms:
- keratinous adjective or keratinoid
See keratin in American Heritage Dictionary 4
noun
A tough, insoluble protein substance that is the chief structural constituent of hair, nails, horns, and hooves.
Origin:
Origin: Greek keras, kerāt-, horn; see ker-1 in Indo-European roots
Origin: + -in
.Related Forms:
- ke·ratˈi·nous (kə-rătˈn-əs) adjective
Learn more about keratin
