An Etymological Dictionary of Astronomy and Astrophysics

Allowing → electromagnetic radiation  of → specific → wavelengths to pass through. See also → translucent.

Etymology (EN): From M.L. transparentem (nominative transparens), pr.p. of transparere “to show through,” from L. → trans- “through” + parere “to come in sight, appear.”

Etymology (PE): Tarânemâ, from tarâ-, → trans-, + nemâ present stem of nemudan “to show” (Mid.Pers. nimūdan, nimây- “to show,” from O.Pers./Av. ni- “down; into,” → ni- (PIE), + māy- “to measure;” cf. Skt. mati “measures,” matra- “measure;”
Gk. metron “measure;” L. metrum; PIE base *me- “to measure”).