a. [ L.aethereus, Gr. &unr_; See Ether. ] 1. Formed of ether; ethereal. [ Obs. ] [ 1913 Webster ]

This ethereous mold whereon we stand. Milton. [ 1913 Webster ]

2. (Chem.) Pertaining to, or resembling, ether. [ 1913 Webster ]

Ethereous oil. See Ethereal oil, under Ethereal. [ 1913 Webster ]

adv. Of that or this. [ 1913 Webster ]

In the day that thou eatest thereof, thou shalt surely die. Gen. ii. 17. [ 1913 Webster ]