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al•gae



Pronunciation: (al'jē), [key]
n.pl.,
sing. -gaPronunciation: (-gu). [key]

any of numerous groups of chlorophyll-containing, mainly aquatic eukaryotic organisms ranging from microscopic single-celled forms to multicellular forms 100 ft. (30 m) 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. Cf. blue-green algae.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

AlgAlgar
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