An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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aplanatism
  نابیراهی  
nâbirâhi
Fr.: aplanétisme  

Freedom from spherical aberration and coma.

Etymology (EN): Aplanatism, from aplanatic, from a- “negation prefix” + Gk. plane “wandering,” from
planasthai “to wander” + -tic adjective-forming suffix.

Etymology (PE): Nâbirahi, from nâ- “negation prefix” + birah “a devious path; a wanderer, who deviates, errs,” + -i noun affix.