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1 definition found for Pleurosigma angulatum

Webster's Revised Unabridged Dictionary (1913)
Pleurosigma Pleu`ro*sig"ma, n. [NL. See Pleuro-, and Sigma.] (Bot.) A genus of diatoms of elongated elliptical shape, but having the sides slightly curved in the form of a letter S. Pleurosigma angulatum has very fine striations, and is a favorite object for testing the high powers of microscopes.




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