hormone: a chemical messenger secreted into the bloodstream from specialized glandular cells, including those of the endocrine glands, of the brain and neuroendocrine systems, and of some visceral tissues. It carries information to other cells and organs of the body. A body chemical secreted from specialized glandular cells, especially in the endocrine glands, and carried in the bloodstream for use in other parts and cells of the body.
See also pheromone.
Dictionary of Sexology Project: Main Index