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Definitions for Alga

[1] any of numerous groups of chlorophyll-containing, mainly aquatic eukaryotic organisms ranging from microscopic single-celled forms to multicellular forms 100 feet (30 meters) or more long, distinguished from plants by the absence of true roots, stems, and leaves and by a lack of nonreproductive cells in the reproductive structures: classified into the six phyla Euglenophyta, Crysophyta, Pyrrophyta, Chlorophyta, Phaeophyta, and Rhodophyta.
[2] unicellular or multicellular organisms formerly classified as plants, occurring in fresh or salt water or moist ground, that have chlorophyll and other pigments but lack true stems, roots, and leaves. Algae, which are now regarded as protoctists, include the seaweeds, diatoms, and spirogyra

Words nearby Alga

ealfvén, alfvén wave, alföld, alg., alga, algae, algar, algaroth powder, algarroba, algarve, algebra

Origin of Alga

e< New Latin, plural of Latin alga seaweed

Other words from Alga

al·gal , adjective

Word origin for Alga

eC16: from Latin, plural of alga seaweed, of uncertain origin