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prochloron

[proh-klawr-on, -klohr-] /proʊˈklɔr ɒn, -ˈkloʊr-/
noun, Biology
1.
any spherical, photosynthetic, prokaryotic microorganism of the genus Prochloron, occurring in subtropical and tropical habitats in symbiosis with various invertebrates, especially marine chordates, proposed as ancestral to the chloroplast of green algae and plants.
Origin
< Neo-Latin < Greek próchlōron, neuter of próchlōros greenish (see pro-2, chloro-1)
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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