Or*thog"ra*pher(?), n. One versed in orthography; one who spells words correctly.
Or`tho*graph"ic*al(?), } a. [Cf. F. orthographique, L. orthographus, Gr. .] 1. Of or pertaining to orthography, or right spelling; also, correct in spelling; as, orthographical rules; the letter was orthographic.
(Geom.) Of or pertaining to right lines or angles.
Orthogonal projection, that projection which is made by drawing lines, from every point to be projected, perpendicular to the plane of projection. Such a projection of the sphere represents its circles as seen in perspective by an eye supposed to be placed at an infinite distance, the plane of projection passing through the center of the sphere perpendicularly to the line of sight.
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Sun 05th April 2020