An Etymological Dictionary of Astronomy and Astrophysics

1. Burning gas or vapor, as from wood or coal, that is undergoing combustion; a portion of ignited gas or vapor.
   

2. Any flame-like condition; glow; inflamed condition (Dictionary.com).

Etymology (EN): M.E. flaume, variant of flaumbe from Anglo-French flaume, flaumbe “a flame;” O.Fr. flambe, from L. flammula “small flame,” diminutive of flamma “flame, blazing fire,” from PIE *bhleg- “to shine, flash,” from root *bhel- (1) “to shine, flash, burn.”

Etymology (PE): Âyež, from (Dehxodâ) âyež “flame,” variants âyiž, âyežé, ižak, of unknown origin.