An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

1) General: A father or a mother. A precursor, or → progenitor.
2) Physics: A → nuclide that upon → radioactive decay or → disintegration yields a specific nuclide (the → daughter). See also → parent cloud, → parent element, → parent galaxy, → parent molecule.

From O.Fr. parent, from L. parentem (nominative parens) "father or mother, ancestor," from parere "to bring forth, give birth to, produce," from PIE base *per- "to bring forth"

Permâr, literally "father-mother" (as in Sogd. māt-pitri "parent"), from Gilaki per, → father, + Gilaki mâr, → mother.

Usually of a newborn star, the molecular cloud in which the star has formed.

→ parent; → cloud.

A radioactive element that spontaneously decays into a new substance. The product of this decay is known as a "daughter" element.

→ parent; → element.

Of a high redshift supernova, the galaxy in which the event has occurred.

→ parent; → galaxy.

The molecule initially produced when a comet nucleus sublimates, soon changed to different daughter molecules because of solar radiation.

→ parent; → molecule.

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

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

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").