1 transference of heat in a gas or liquid by upward movement of the heated and less dense medium.
2 Meteorol. the transfer of heat by the upward flow of hot air or downward flow of cold air.
Phrases and idioms:
convection current circulation that results from convection.
Derivatives:
convectional adj. convective adj.
Etymology: LL convectio f. L convehere convect- (as COM-, vehere vect- carry)
Useful english dictionary. 2012.