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green algae

any grass-green, chiefly freshwater algae of the phylum Chlorophyta, often growing on wet rocks, damp wood, or on the surface of stagnant water.
1900-05 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for green algae
  • Made of an even cheaper grade of plastic, a film of green algae developed on the bottom of my test unit after a week.
  • To make neurons sensitive to light, scientists genetically engineer them to carry a protein adapted from green algae.
  • Many of the fossils closely resemble species of blue-green algae found all over the world today.
  • During the day, the animal's fleshy mantle-which contains green algae-spreads over its open shell to take in sunlight.
  • Runoff can also help create a fertile environment for cyanobacteria, also called blue-green algae.
  • green algae may rely on quantum computing to turn sunlight into food.
  • These used to be called blue-green algae, and they produce the oxygen that all animals breathe.
  • The new hordes of blue-green algae deplete the oxygen and are a less favorable food supply.
  • The answer is tiny organisms known as cyanobacteria, or blue-green algae.
  • Who will give away such a precious blue-green algae also known as green gold.
British Dictionary definitions for green algae

green algae

plural noun
the algae of the phylum Chlorophyta, which possess the green pigment chlorophyll. The group includes sea lettuce and spirogyra
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for green algae


members of the division Chlorophyta, comprising between 9,000 and 12,000 species. The photosynthetic pigments (chlorophylls a and b, carotene, and xanthophyll) are in the same proportions as those in higher plants. The typical green algal cell, which can be motile or nonmotile, has a central vacuole, pigments contained in plastids that vary in shape in different species, and a two-layered cellulose and pectin cell wall. Food is stored as starch in pyrenoids (proteinaceous cores within the plastids). Green algae, variable in size and shape, include single-celled (Chlamydomonas, desmids), colonial (Hydrodictyon, Volvox), filamentous (Spirogyra, Cladophora), and tubular (Actebularia, Caulerpa) forms. Sexual reproduction is common, with gametes that have two or four flagella. Asexual reproduction is by cell division (Protococcus), motile or nonmotile spores (Ulothrix, Oedogonium), and fragmentation.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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