D defs.my
Entry 2 senses Webster, 1913

Ethereous

· E·the·re·ous · IPA
01 a. Formed of ether; ethereal.
  1. 1.
    Formed of ether; ethereal.[Obs.]
    “This ethereous mold whereon we stand.” Milton.
  2. 2.
    Pertaining to, or resembling, ether.(Chem.)
Phrases & compounds
Ethereous oil — See Ethereal oil, under Ethereal.