Hypernyms (thermometer is a kind of...): measuring device; measuring instrument; measuring system (instrument that shows the extent or amount or quantity or degree of something) Meronyms (parts of thermometer):
Noun. 1. hormone-the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect. endocrine, internal secretion. secretion-a functionally specialized substance (especially one that is not a waste) released from a gland or cell.
Hormones may be regulated by other hormones, by glands and organs, and by a negative feedback mechanism. Hormones that regulate the release of other hormones are called tropic hormones. The majority of tropic hormones are secreted by the anterior pituitary in the brain. The hypothalamus and thyroid gland also secrete tropic hormones. The hypothalamus produces the tropic hormone thyrotropin-releasing hormone (TRH), which stimulates the pituitary to release thyroid stimulating hormone (TSH).