blue-green algae

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.
Also called cyanobacteria.


Origin:
1895–1900

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
blue-green algae
 
pl n
the former name for cyanobacteria

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Runoff can also help create a fertile environment for cyanobacteria, also
  called blue-green algae.
The answer is tiny organisms known as cyanobacteria, or blue-green algae.
Who will give away such a precious blue-green algae also known as green gold.
But they might well have been photosynthetic blue-green algae.
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