Convection Definition

kən-vĕkshən

noun

A transmitting or conveying.

Webster's New World

The mass movement of portions of a fluid within the fluid, caused by differences in density.

Webster's New World

The transfer of heat by its absorption by a fluid at one point, followed by motion of the fluid and rejection of the heat at another point.

Webster's New World

The transfer of heat or other atmospheric properties by massive motion within the atmosphere, especially by such motion directed upward.

American Heritage

(meteorology) The vertical movement of heat and moisture, especially by updrafts and downdrafts in an unstable air mass. The terms convection and thunderstorm are often used interchangeably, although thunderstorms are only one form of convection. Towering cumulus clouds are visible forms of convection.

Wiktionary

adjective

Designating or of an oven, grill, etc. that circulates the hot air continuously, by means of a fan, for faster, more even cooking.

Webster's New World

Origin of Convection

Late Latin convectiō convectiōn- from convectus past participle of convehere to carry together Latin com- com- Latin vehere to carry wegh- in Indo-European roots

From American Heritage Dictionary of the English Language, 5th Edition
From Latin convectionem, from convectio (“act of carrying”), from convect-, past participle of convehere (“to carry together”), combination of com- and vehere.

From Wiktionary