Keratin
Nuttall Encyclopedia · 1907 · p. 26
a substance forming the chief constituent in the hair, nails, and horn of animals.
Bu kavram başka kaynaklarda da geçiyor
The American Illustrated Medical Dictionary (1913)
An Illustrated Dictionary of Medicine, Biology and Allied Sciences (1907)
The Student's Medical Dictionary (1896)
An Illustrated Encyclopedic Medical Dictionary (1893)
Neuro-keratin
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An Illustrated Dictionary of Medicine, Biology and Allied Sciences (1907)
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