CATHETUS
Etymology
Noun
cathetus (plural catheti or cathetuses)
(geometry) A line perpendicular to a surface (or line); in particular, either of the sides of a right triangle other than its hypotenuse.
Synonyms
• (side of a right triangle): leg
Anagrams
• teuchats
Source: Wiktionary
Cath"e*tus, n.; pl. catheti. Etym: [L., fr. Gr. Catheter.] (Geom.)
Definition: One line or radius falling perpendicularly on another; as, the
catheti of a right-angled triangle, that is, the two sides that
include the right angle. Barlow.
Source: Webster’s Unabridged Dictionary 1913 Edition