alga

al·ga

noun \ˈal-gə\

plural al·gae \ˈal-(ˌ)jē\ also algas

Definition of ALGA

: a plant or plantlike organism of any of several phyla, divisions, or classes of chiefly aquatic usually chlorophyll-containing nonvascular organisms of polyphyletic origin that usually include the green, yellow-green, brown, and red algae in the eukaryotes and especially formerly included the cyanobacteria in the prokaryotes

—al·gal \-gəl\ adjective