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orthoëpist |
orthoëpy |
ortho- |
orthoboric acid |
orthocarbonic |
orthocenter
| orthoceras
| orthoceratite
| orthochorea
| orthochromatic film
| orthoclase
orthocenter
CIDE DICTIONARY
orthocenter, n. [Ortho- + center.].
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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