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[zoh-uh-kluh-rel-uh] /ˌzoʊ ə kləˈrɛl ə/
noun, plural zoochlorellae [zoh-uh-kluh-rel-ee] /ˌzoʊ ə kləˈrɛl i/ (Show IPA), zoochlorellas.
any of various symbiotic green algae in the cytoplasm of certain freshwater invertebrates, as stentors and hydras. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Encyclopedia Article for zoo-chlorella


small green alga (often Chlorella) or, sometimes, flagellate protozoan (e.g., Tetraselmis, Carteria) that lives within the bodies of various freshwater protozoans and invertebrates. Zoochlorellae often colour their hosts green (e.g., green hydra and green Paramecium bursaria). As symbionts, zoochlorellae use carbon dioxide and nitrogenous and phosphorous wastes and, in illuminated conditions, provide oxygen and useful nutrients to their hosts. Sometimes zoochlorellae are digested by the host. They may be passed from one generation to another in host germ cells. Some can be grown as pure cultures away from their usual hosts

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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