acinus

n. seed of a grape or berry (Botany); small fruits which grow in a cluster (Botany); small saclike formation found in certain glands (Anatomy)

An acinus (adjective: acinar, plural acini) refers to the berry-shaped termination of an exocrine gland, where the secretion is produced. They are found in many organs, including:the stomachthe sebaceous gland of the scalpthe salivary glands of the tonguethe liverthe lacrimal glandsthe pancreas Mucous acini usually stain pale, while serous acini usually stain dark.
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Acinus /ac·i·nus/ pl. a´cini [L.] a small saclike dilatation, particularly one in a gland; see also alveolus. [more]Acinus - Community and Resources

Noun
1. one of the small drupes making up an aggregate or multiple fruit like a blackberry
(hypernym) drupelet
2. one of the small sacs or saclike dilations in a compound gland
(hypernym) sac
(part-holonym) gland, secretory organ, secretor, secreter

n. (Botany) acinus, seed of a grape or berry, small fruits which grow in a cluster; (Anatomy) small saclike formation found in certain glands