Cath"e*tus (?), n.; pl. catheti (#). [L., fr. Gr. a perpendicular line, fr. let down, fr. . See Catheter.] Geom.

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.

 

© Webster 1913.

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