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

Word History and Origins

Origin of red algae¹

First recorded in 1850–55

Example Sentences

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

From Science Magazine

After he first noticed the red algae in 2012, he tracked their spread at his study sites.

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

But research on snowfields and glaciers across Iceland, Greenland and Scandinavia found red algae increases heat absorption by 13%.

From Seattle Times