Dictionary.net

A small grain.

In histology, (a) a minute mass in a cell, or in ground substance, which has a determinate outline, but no apparent structure; (b) any minute mass (e. g., the small celllike bodies in the so-called granular layer of the cerebellar cortex, the acini of the thymus gland, lymph corpuscles, etc.); (c) the nodal or crossing points of a nuclear or intracellular reticulum or the fibrils of such a reticulum seen endwise.

In pharmacy, a small globule, generally composed of sugar and gum tragacanth, combined with a medicinal substance.