A Bird's Feathers

This page is the CodyCross answer for the clue below from Science Lab, Group 305, Puzzle 3 (Molecular Formula).

Question is: A Bird's Feathers

and the answer is: PLUMAGE

Word Meaning:

PLUMAGE — (ornithology, collective noun) Layer or collection of feathers covering a bird’s body; feathers used ornamentally; feathering.

Definitions from Wiktionary.