orthographic (adj.)

1660s, in reference to a type of perspective in drawings, etc., from ortho- "true, correct" + -graphic "of or pertaining to drawing" (see graphic (adj.)). Meaning "belonging to the writing of words with proper letters, relating to the spelling of words" is by 1868, from orthography + -ic. Related: Orthographically (used from 1610s in reference to spelling).