Hypotenuse

[haɪ'pɒtənjuːz;-s] or [haɪ'pɑtənus]

(noun.) the side of a right triangle opposite the right angle.

Checker: Roy--From WordNet

(n.) Alt. of Hypothenuse

Editor: Murdoch

n. the side of a right-angled triangle opposite to the right angle.

Editor: Miles