blue-green alga
noun
ˈblü-ˈgrēn- 
plural blue-green algae also blue-green algas
: cyanobacterium
Example Sentences
Recent Examples on the Web The algae partner can be either a green alga or a blue-green alga, known as cyanobacteria. 
Howard Garrett, Dallas News, 17 June 2020
Howard Garrett, Dallas News, 17 June 2020 Word History
First Known Use
1880, in the meaning defined above
Medical Definition
blue-green alga
noun
ˈblü-ˈgrēn-
: cyanobacterium
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