Main Entry: con·vec·tion

Pronunciation: \kən-ˈvek-shən\

Function: noun

Etymology: Late Latin convection-, convectio, from Latin convehere to bring together, from com- + vehere to carry — more at way

Date: circa 1623

1 : the action or process of conveying
2 a : the circulatory motion that occurs in a fluid at a nonuniform temperature owing to the variation of its density and the action of gravity b : the transfer of heat by convection — compare conduction, radiation

— con·vec·tion·al \-shnəl, -shə-n^əl\ adjective