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pleurosigma - Meaning and Examples

Meaning of 'pleurosigma' (Webster Dictionary)

1 . Pleurosigma [ n.]
- 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.