ORTHOGRAPH'ICAL, a. 1. Correctly spelled; written with the proper letters.2. Pertaining to the spelling of words; as, to make an orthographical mistake.Orthographic projection of the sphere, a delineation of the sphere upon a plane that cuts it in the middle, the eye being supposed to be placed at an infinite distance from it.A projection in which the eye is supposed to be at an infinite distance; so called because the perpendiculars from any point of the sphere will all fall in the common intersection of the sphere with the plane of the projection.
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