Fibrous Protein Found in Hair, Nails and Feathers
This page is the CodyCross answer for the clue below from Rainforest, Group 1207, Puzzle 3 (Entomology).
Question is: Fibrous Protein Found in Hair, Nails and Feathers
and the answer is: KERATIN
Word Meaning:
KERATIN — (biochemistry) The protein of which hair and nails are composed.
Definitions from Wiktionary.