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

The act of comparing or the process of being compared.

From O.Fr. comparaison from L. comparationem, from p.p. stem of comparare, → compare.

Hamsanješ, from hamsanj present tense stem of hamsanjidan, → compare, + -š verbal noun suffix.

A spectrum of known substances used as a standard of comparison for investigating spectra of celestial objects.

→ comparison; → spectrum.

A non-variable star used to monitor the variations of another nearby star.

→ comparison; → star.