nostoc

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nostoc

(nŏs′tŏk′)
n.
Any of various freshwater nitrogen-fixing cyanobacteria of the genus Nostoc that form spherical colonies of filaments embedded in a gelatinous substance.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
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