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The Collaborative International Dictionary
Zooerythrine

Zooerythrine \Zo`["o]*e*ryth"rine\, n. [Zo["o]- + Gr. ? red.] (Zo["o]l.) A peculiar organic red coloring matter found in the feathers of various birds.

Wiktionary
zooerythrine

n. (context zoology English) A peculiar organic red coloring matter found in the feathers of various birds.