convection

con·vec·tion

noun \kən-ˈvek-shən\

Definition of CONVECTION

1

: the circulatory motion that occurs in a fluid at a nonuniform temperature owing to the variation of its density and the action of gravity

2

: the transfer of heat by convection in a fluid

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

—con·vec·tive \-ˈvek-tiv\ adjective