landing flap

noun
a flap in the undersurface of the trailing edge of an aircraft wing, capable of being moved downward to increase either lift or drag or both, as for landing. Compare split flap ( def 1 ).

Origin:
1935–40

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
The design criterion is to select the landing flap setting that produces the shortest runway length.
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