n. 传送, 对流, 传导

[化] 对流

[医] 对流

Convection \Con*vec"tion\, n. [L. convectio, fr. convehere to
bring together; con- + vehere to carry.]
1. The act or process of conveying or transmitting.

2. (Physics) A process of transfer or transmission, as of
heat or electricity, by means of currents in liquids or
gases, resulting from changes of temperature and other
causes.

Liquids are generally heated by convection -- when
heat is applied from bellow. --Nichol.