yellow-green algae

noun Biology.
a group of common single-celled and colonial algae of the phylum Chrysophyta, having mostly yellow and green pigments, occurring in soil and on moist rocks and vegetation and also as a slime or scum on ponds and stagnant waters.
Also, yellow green algae.


Origin:
1925–30

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Encyclopedia Britannica
Encyclopedia

yellow-green algae

members of the class Xanthophyceae (division Chromophyta), consisting of approximately 600 species, once classified with the green algae on the basis of similarity of body organization. The Xanthophyceae are distinguished by their food reserve (oil), the quantity of beta-carotene in their plastids, and motile cells with unequal flagella. Frequently their cell walls are two overlapping halves. The usual method of asexual reproduction is by motile zoospores or nonmotile resting aplanospores. Sexual reproduction is rare; the genus Vaucheria is an important exception.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Diatoms, for example, are a group of yellow-green algae with finely sculptured shells.
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