noun
(also quadriplane)
1Mathematics
A structure consisting of four rigid plane pieces, each in the form of a right-angled V, hinged end to end to form a closed chain.2Aeronautics
historical An aeroplane with four sets of wings, one above another.
Origin
Late 19th century; earliest use found in James Joseph Sylvester (1814–1897), mathematician. From quadru- + plane.
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