Hypotenuse
Hypotenuse , noun
[Latin hypotenusa, Greek {not transcribed}, prob., subtending (sc. {not transcribed}), from {not transcribed} to stretch under, subtend; {not transcribed} under + {not transcribed} to stretch. See Subtend.]
(Geometry) The side of a right-angled triangle that is opposite to the right angle.
Also: Hypothenuse