Definify.com
Webster 1913 Edition
Convection
Con-vec′tion
,Noun.
[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 below. Nichol.