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blue'-green al'gae

a widely distributed group of predominantly photosynthetic prokaryotic organisms of the subkingdom Cyanophyta, resembling phototrophic bacteria, occurring singly or in colonies in diverse habitats: some species can fix atmospheric nitrogen. Also called cyanobacteria.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

blue-greenblue grosbeak
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