blowdown

[bloh-doun]
noun
1.
Automotive. a procedure for measuring the compression within an engine to identify certain mechanical defects, such as worn piston rings.
2.
a tree or stand of timber that has been blown down by the wind.

Origin:
1880–85 for earlier sense; noun use of verb phrase blow down

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
blowdown (ˈbləʊˌdaʊn)
 
n
an accident in a nuclear reactor in which a cooling pipe bursts causing the loss of essential coolant

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Drift loss is small compared to evaporation and blowdown, and is controlled with baffles and drift eliminators.
The ratio of evaporation to blowdown is called the cycles of concentration.
In areas where the canopy has been opened through blowdown of trees, there is a well-developed shrub understory.
Blowdown and elevation were of secondary importance.
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