An Etymological Dictionary of Astronomy and Astrophysics

Very thin or slender. → fine structure, → fine-structure constant.

Etymology (EN): M.E. fin, from O.Fr. fin “perfected, of highest quality,” from L. finis “end, limit.”

Etymology (PE): Nâzok “thin, slender, subtle,” from Mid.Pers. nâzuk “tender, gentle,” variant nâzik, from nâz “joy, pride, glory” + → -ik.