plural noun Biology.
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.
Blue SteelRead more in this article about some frequently asked questions and fun facts related to our definitions.
Blue WaffleRead more in this article about some frequently asked questions and fun facts related to our definitions.
- blue-eyed grass,
- blue-eyed mary,
- blue-eyed soul,
- blue-green alga,
- blue-headed vireo,
Origin of blue-green algae
First recorded in 1895–1900
Also called cyanobacteria.
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012