An Etymological Dictionary of Astronomy and Astrophysics

A single-celled or multicellular plant living in water or moist conditions, which contain chlorophyll and other pigments but has no true root, stem, or leaf. Algae include seaweeds and pond scum.

Etymology (EN): From alga (singular), from L. alga “seaweed,” of uncertain origin.

Etymology (PE): Jolbak “alga.”