An Etymological Dictionary of Astronomy and Astrophysics

The maximum angle at which a display, such as a TV screen, can be viewed with acceptable visual performance.

Etymology (EN): Viewing, from view, M.E. v(i)ewe (n.); M.Fr. veue “sight,” feminine p.p. of veoir “to see,” from L. videre “to see,” → vision; → angle.

Etymology (PE): Zâviyé, → angle; did→ vision.