the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect
a heat engine in which combustion occurs inside the engine rather than in a separate furnace; heat expands a gas that either moves a piston or turns a gas turbine
the organic process of synthesizing and releasing some substance
a functionally specialized substance (especially one that is not a waste) released from a gland or cell
occurring within an institution or community
inside the country
innermost or essential
