n. In botany: One of the small drupelets or berries of an aggregate baccate fruit, as the blackberry, etc., or the contained stone or seed. See cut under Rubus. A grape-stone.n. In anatomy: Formerly, the smallest lobule of a gland, Now, generally, the smallest saccular subdivision of an acinose gland, several of which subdivisions make up a lobule. Also called alveolus. A lobule of the liver.