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blue-green algae

American  
[bloo-green al-jee] / ˈbluˌgrin ˈæl dʒi /

plural noun

Microbiology.
  1. cyanobacteria.


blue-green algae British  

plural noun

  1. the former name for cyanobacteria

"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

Etymology

Origin of blue-green algae

First recorded in 1895–1900

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

How can Lough Neagh's blue-green algae problem be solved?

From BBC Jun. 24, 2026

Instead of the previous blue-green algae, the new green algae is "just taking over," Paerl said.

From Barron's Jun. 21, 2026

These nutrients make "harmful" blue-green algae more likely which can be dangerous to people and animals.

From BBC May 20, 2026

Last year, scientists in the country announced they had launched successful trials spraying the soil with cyanobacteria, also known as "blue-green algae" -- a method that helps retain moisture and facilitate tree rooting.

From Barron's Dec. 18, 2025

In structure and pigment content they are the images of prokaryotic blue-green algae.

From "The Lives of a Cell" by Lewis Thomas

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