hypotenuse
UK /haɪˈpɒtənjuːz/ · US /haɪˈpɑtənus/ noun
Forms hypotenuses hypotheni
Etymology
From Latin hypotenusa, from Ancient Greek ὑποτείνουσα πλευρά (hupoteínousa pleurá, “side subtending [the right angle]”), from ὑποτείνουσα (hupoteínousa, “stretching, extending, subtending”), active participle of ὑποτείνω (hupoteínō, “subtend, stretch under”).
Webster’s 1913
Etymology [L. hypotenusa, Gr. Subtend.]
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “hypotenuse”, CC BY-SA 4.0. Details