empyreal

EMPYR'EAL, a. [L. empyroeus; from Gr. fire.]

1. Formed of pure fire or light; refined beyond aerial substance; pertaining to the highest and purest region of heaven.

Go, soar with Plato to the empyreal sphere.

2. Pure; vital; dephlogisticated; an epithet given to the air, or rather gas, now called oxygen.