red algae

American  

plural noun

Biology.

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

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red algae British  

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

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Etymology

Origin of red algae

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.

From Los Angeles Times

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

From Science Magazine

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.

From Science Magazine

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

From Science Daily

The explorer attributed its color to red algae.

From DOGO News