An Etymological Dictionary of Astronomy and Astrophysics

A particular form or variant of something.
An account of something, given from a specific point of view.

Etymology (EN): M.E., from M.Fr. version, from M.L. versionem (nominative versio) “a turning,” from p.p. stem of L. vertere “to turn;” cognate with Pers. gardidan “to change,” as below.

Etymology (PE): Gardâk, present stem of gardidan “to change, to turn” (Mid.Pers. vartitan “to change, to turn;” Av. varət- “to turn, revolve;” cf. Skt. vrt- “to turn, roll,” vartate “it turns round, rolls;” L. vertere “to turn;”
O.H.G. werden “to become;” PIE base *wer- “to turn, bend”) + -âk noun suffix.