pleurosigma Meaning, Definition & Usage

Pleu`ro*sig"ma noun

Etymology

NL. See Pleuro-, and Sigma.

Definitions

1. (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.