alga

noun
al·​ga | \ ˈal-gə How to pronounce alga (audio) \
plural algae\ ˈal-​(ˌ)jē How to pronounce alga (audio) \ also algas

Definition of alga

: a plant or plantlike organism of any of several phyla, divisions, or classes of chiefly aquatic usually chlorophyll-containing nonvascular organisms of polyphyletic origin that usually include the green, yellow-green, brown, and red algae in the eukaryotes and especially formerly the cyanobacteria in the prokaryotes

Other Words from alga

algal \ ˈal-​gəl How to pronounce alga (audio) \ adjective

Examples of alga in a Sentence

Recent Examples on the Web Lichens are actually two organisms working together: a fungus and either alga or cyanobacterium. Corryn Wetzel, Smithsonian Magazine, 17 Feb. 2022 The lagoons are home to a variety of microorganisms, including Dunaliella salina, an alga responsible for the red hue. Washington Post, 10 Dec. 2021 This alga is a critical food source for brine shrimp and other salt-tolerant species, which attract migratory shorebirds. Washington Post, 10 Dec. 2021 The course, woolly textured alga was found in a portion of the Upper Manistee River in Kalkaska County. Keith Matheny, Detroit Free Press, 7 Dec. 2021 The secret to photosynthesis passed to the alga and all its heirs. Elizabeth Kolbert, The New Yorker, 6 Dec. 2021 Yet the verdant spheres are a different organism altogether: Chlorella, an alga that occasionally takes refuge within the confines of the paramecium’s cushy cell membrane. Quanta Magazine, 7 June 2021 This particular photograph also documents the incremental nature of the scientific method: DNA analysis has shown that people mistakenly lumped at least three alga species under the name Halymenia latifolia since that label was created. Leslie Nemo, Scientific American, 29 Mar. 2021 Once the water temperature returns to normal, any polyps that haven’t starved to death will host another alga. Erik Stokstad, Science | AAAS, 8 Dec. 2020 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'alga.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of alga

1551, in the meaning defined above

History and Etymology for alga

Latin, seaweed

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Cite this Entry

“Alga.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/alga. Accessed 16 May. 2022.

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More Definitions for alga

alga

noun
al·​ga | \ ˈal-gə How to pronounce alga (audio) \
plural algae\ ˈal-​ˌjē \

Kids Definition of alga

: any of a large group of simple plants and plant-like organisms (as a seaweed) that usually grow in water and produce chlorophyll like plants but do not produce seeds

alga

noun
al·​ga | \ ˈal-gə How to pronounce alga (audio) \
plural algae\ ˈal-​(ˌ)jē How to pronounce alga (audio) \ also algas

Medical Definition of alga

: a plant or plantlike organism of any of several phyla, divisions, or classes of chiefly aquatic usually chlorophyll-containing nonvascular organisms of polyphyletic origin that usually include the green, yellow-green, brown, and red algae in the eukaryotes and especially formerly included the cyanobacteria in the prokaryotes

Other Words from alga

algal \ -​gəl How to pronounce alga (audio) \ adjective

More from Merriam-Webster on alga

Nglish: Translation of alga for Spanish Speakers

Britannica English: Translation of alga for Arabic Speakers

Britannica.com: Encyclopedia article about alga

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