orthocenter


From The Collaborative International Dictionary of English v.0.48:

Orthocenter \Or`tho*cen"ter\, n. [Ortho- + center.] (Geom.)
   That point in which the three perpendiculars let fall from
   the angles of a triangle upon the opposite sides, or the
   sides produced, mutually intersect.
   [1913 Webster]
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