red alga

noun

Definition of red alga

: any of a division (Rhodophyta) of chiefly marine algae that have predominantly red pigmentation

Examples of red alga in a Sentence

Recent Examples on the Web Cryptophytes are the result of a merger between two organisms: a red alga that was engulfed by another unknown eukaryote (an organism with cells that contain enclosed nuclei). Viviane Callier, Smithsonian, 23 Oct. 2019

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

First Known Use of red alga

1834, in the meaning defined above

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The first known use of red alga was in 1834

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Dictionary Entries Near red alga

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Cite this Entry

“Red alga.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/red%20alga. Accessed 20 Sep. 2021.

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More Definitions for red alga

red alga

noun

Medical Definition of red alga

: any of a division (Rhodophyta) of chiefly marine algae that have predominantly red pigmentation

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