red alga

noun

plural red algae also red algas

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

Word History

First Known Use

1834, in the meaning defined above

Kids Definition

red alga

noun

: any of various algae that usually grow in the ocean and are of reddish color

Medical Definition

red alga

noun

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