Zool. [ad. L. fenestrula, dim. of FENESTRA.] (See quot. 1881.)
1872. Nicholson, Palæont., 196. The branches of the cœnœcium unite with one another in such a manner as to form ovate interspaces or ‘fenestrules.’
1881. Nature, 15 Sept., 463/1. Fenestrules.—The square, oblong, or partially rounded openings in the zoarium--connected by non-cellular dissepiments—of Fenestella, Polypora, and species allied to these.
