convection

[kuhn-vek-shuhn]
noun
1.
Physics. the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
2.
Meteorology. the vertical transport of atmospheric properties, especially upward (distinguished from advection ).
3.
the act of conveying or transmitting.

Origin:
1615–25; < Late Latin convectiōn- (stem of convectiō) a bringing together. See convect, -ion

convectional, adjective
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World English Dictionary
convection (kənˈvɛkʃən)
 
n
1.  Compare conduction a process of heat transfer through a gas or liquid by bulk motion of hotter material into a cooler region
2.  meteorol the process by which masses of relatively warm air are raised into the atmosphere, often cooling and forming clouds, with compensatory downward movements of cooler air
3.  geology the slow circulation of subcrustal material, thought to be the mechanism by which tectonic plates are moved
 
[C19: from Late Latin convectiō a bringing together, from Latin convehere to bring together, gather, from vehere to bear, carry]
 
con'vectional
 
adj
 
con'vective
 
adj

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Etymonline
Word Origin & History

convection
1623, from L. convectionem "the act of carrying," from pp. stem of convehere "to carry together," from com- "together" + vehere "to carry" (see vehicle). Convection current recorded from 1868.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

convection con·vec·tion (kən-věk'shən)
n.

  1. heat transfer in a gas or liquid by the circulation of currents from one region to another.

  2. Fluid motion caused by an external force such as gravity.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
convection   (kən-věk'shən)  Pronunciation Key 
Current in a fluid caused by uneven distribution of heat. For example, air on a part of the Earth's surface warmed by strong sunlight will be heated by contact with the ground and will expand and flow upward, creating a region of low pressure below it; cooler surrounding air will then flow in to this low pressure region. The air thus circulates by convection, creating winds. See Note at conduction.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

convection definition


The motion of warm material that rises, cools off, and sinks again, producing a continuous circulation of material and transfer of heat. Some examples of processes involving convection are boiling water, in which heat is transferred from the stove to the air; the circulation of the atmosphere of the Earth, transferring heat from the equator to the North Pole and South Pole; and plate tectonics, in which heat is transferred from the interior of the Earth to its surface.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
They also include fully equipped kitchens complete with cook tops, convection
  ovens, dishwashers and refrigerators.
The suites also have full kitchens, with microwaves, convection ovens and
  refrigerators.
Rooms that feature kitchens come with granite countertops and convection ovens.
Sunspots are visible because the bundled field lines impede the flow of
  convection.
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