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air dam
noun
- a spoiler mounted at the front of an automobile to reduce air flow on the underside of the chassis to increase stability.
air dam
noun
- any device, such as a spoiler, that reduces air resistance and increases the stability of a car, aircraft, etc
Word History and Origins
Origin of air dam1
Example Sentences
The Appalachian Mountains often trap the dense, icy air layer, known as a cold air dam, while Atlantic winds usher in a milder air mass that glides up and over the top.
The highest impact ice event of that winter unfolded Feb. 10-11, with a massive cold air dam that stretched east of the Appalachians from Maine to Georgia.
There, a stalled frontal boundary enabled milder air to slide up and over the cold air dam.
The cold air gets trapped against the eastern slopes of the Appalachians, forming a shallow dome of subfreezing air called a cold air dam or wedge.
The subfreezing air wedge/cold air dam is shown in blue; the milder air wedge is shaded orange.
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