(n): a functionally specialized substance (especially one that is not a waste) released from a gland or cell
(n): any of the glands of the endocrine system that secrete hormones directly into the bloodstream
(n): any of various organs that synthesize substances needed by the body and release it through ducts or directly into the bloodstream
(adj): vs. exocrine), endocrinal -- (of or belonging to endocrine glands or their secretions