An Etymological Dictionary of Astronomy and Astrophysics

1. An instance of seeing or beholding; visual inspection.
   

   2. Sight; vision (Dictionary.com).

Etymology (EN): M.E. v(i)ewe, from M.Fr. veue “sight,” from V.L. *viduta, from *vidutus, from L. visus, p.p. of videre “to see,” → vision.

Etymology (PE): Did, → vision.