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Frise aileron

[freez] /friz/
noun, Aeronautics
1.
an aircraft wing control surface designed with its leading edge extending forward of its axis of rotation so that when the aileron's trailing edge is raised the leading edge extends below the bottom surface of the wing.
Origin
1930-1935
1930-35; named after Leslie G. Frise (born 1897), British engineer
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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