Recent Examples on the WebThe algae partner can be either a green alga or a blue-green alga, known as cyanobacteria.—Howard Garrett, Dallas News, 17 June 2020
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'blue-green alga.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
: any of a major group of microorganisms that typically live in water and undergo photosynthesis and that are now usually classified as bacteria or sometimes as plants
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