red algae

plural noun

Biology.

1. marine algae of the phylum Rhodophyta, in which the chlorophyll is masked by a red or purplish pigment.

red algae

plural noun

1. Also called: red seaweed. the numerous algae that constitute the phylum Rhodophyta , which contain a red pigment in addition to chlorophyll. The group includes carrageen, dulse, and laver

Word History and Origins

Origin of red algae¹

First recorded in 1850–55

Example Sentences

Galdieria extract blue comes from a unicellular red algae, which is an organism that thrives in extreme marine and terrestrial environments, according to the National Institutes of Health.

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Biologists have found giant viruses in the deep sea and hiding in the genomes of red algae.

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The culprits, red algae that form a crust on underwater surfaces such as coral, were previously known to grow only in small patches, tucked away in crevices among the reefs.

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Most are microscopic, single-celled organisms like amoebas, algae, and diatoms, but larger multicellular protists exist -- such as kelp, slime moulds, and red algae.

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The explorer attributed its color to red algae.

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