Bot. [mod.L., on type of a Gr. *κοκκίδιον, dim. of κοκκίς, -ιδ-, dim. of κόκκος grain, berry.] A spherical or hemispherical conceptacle found in the rhodospermous algæ.
1867. J. Hogg, Microsc., II. i. 274. Coccidium, either occurs on lateral branches, or is sessile on the face of the frond.
1876. Harley, Mat. Med., 361. Fructification in hemispherical sessile coccidia, containing oblong spores on a central axis.
