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.
Definition of tropic. 1  1 : either of the two parallels of terrestrial latitude at a distance of about 231â2 degrees north or south of the equator where the sun is directly overhead when it reaches its most northerly or southerly point in the sky â compare tropic of cancer, tropic of capricorn.