名詞 convection:

1. the transfer of heat through a fluid (liquid or gas) caused by molecular motion
2. (meteorology) the vertical movement of heat or other properties by massive motion within the atmosphere

1. A partly enclosed, directly heated surface from which warm air circulates by convection.
   對流式加熱機一個部分被封閉，暖空氣在其直接加熱的表面上通過對流進行循環(huán)的裝置
2. One of the ways to dissipate perspiration is by convection.
   散發(fā)汗水的一種方法是通過對流作用。
3. In convection, hot currents flow upwards.
   在對流中熱氣流向上運動。

con.vec.tion

n.（名詞）
The act or process of conveying; transmission.
傳導(dǎo)：傳送或傳導(dǎo)的行為或過程；傳遞
Physics
【物理學】
Heat transfer in a gas or liquid by the circulation of currents from one region to another.
對流：氣體或液體中通過從一層到另一層的氣流（或水流）循環(huán)進行的熱傳遞
Fluid motion caused by an external force such as gravity.
流體運動：由重力等外力引起的流體運動
Meteorology The transfer of heat or other atmospheric properties by massive motion within the atmosphere, especially by such motion directed upward.
【氣象學】 大氣對流：通過大氣層內(nèi)大規(guī)模氣流運動進行的熱量或其它大氣屬性的傳遞，尤指通過向上的氣流運動

來源：
Late Latin convectiô convectiôn-
后期拉丁語 convectiô convectiôn-
from convectus [past participle of] convehere [to carry together]
源自 convectus [] convehere的過去分詞 [一起搬運]
Latin com- [com-]
拉丁語 com- [前綴，表.一起.]
Latin vehere [to carry] * see wegh-
拉丁語 vehere [搬運] *參見 wegh-

【引伸】
convec.tional
adj.（形容詞）
convec.tive
adj.（形容詞）
convec.tively
adv.（副詞）