- quadruplane
[quadruplane 词源字典]
- " Mathematics . 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", Late 19th cent.; earliest use found in James Joseph Sylvester (1814–1897), mathematician. From quadru- + plane.[quadruplane etymology, quadruplane origin, 英语词源]