The word of the day is ethereal:

ætherius or æthereus ( < Greek αἰθέριος) + -al suffix¹.

1598    R. Barckley Disc. Felicitie of Man iv. 353   In the world, wherewith we are inuironned, [there is a continual ascending] from the elements and compound thinges, by the ethereall substance to heauen.

1638    Bp. J. Wilkins Discov. World in Moone 1,   The Elementary and Æthereal‥doth not belong to the present Question, but of the Sea and Land, etc.

1857    J. G. Wood Comm. Obj. Sea Shore 27   In the kingdom of Ocean, water is the atmosphere, and, like its more ethereal relative, is ever rolling.

1. Of the nature of, or resembling the idea of, the ether or lightest and most subtle of elements; light, airy, attenuated. 

2. Heavenly, celestial. Chiefly poet. 

3. a. Of or pertaining to the material heaven, or highest region of the atmosphere. 

b. Pertaining to the terrestrial atmosphere, in opposition to the lower regions.

4. Spirit-like, impalpable; of unearthly delicacy and refinement of substance, character, or appearance.  

5. Physics. Of, pertaining to, or having the nature of ‘ether’.   

6. Chem. Of or pertaining to the liquid called ‘ether’ (see ether n. 6); resembling ether or its qualities. (OED)

1513    G. Douglas tr. Virgil Æneid xii. Prol. 41   Phebus‥Defundand from hys sege etheriall Glaid influent aspectis celicall.

1530    J. Rastell New Bk. Purgatory iii. ix,   Pure regyon ethereall where the sonne & the other sterres renne.

1610    J. Healey tr. J. L. Vives in tr. St. Augustine Citie of God (1620) 354   Porphyry reckneth gods that are either heauenly, etherall, ayery, watry, earthly, or infernall.

1638    Bp. J. Wilkins Discov. New World (1707) xiv. 115   The extreme Coldness of the Æthereal Air.

1744    M. Akenside Pleasures Imag. i. 42   There to breathe at large Ætherial Air.

1820    Shelley Prometheus Unbound i. i. 32   Mischiefs sent To blast mankind, from yon ethereal tower.

"1-Bromo-3-diazoacetone was treated with a five-fold molar excess of crystalline orthophophoric acid in dry ether containing a trace of BF3.  The reactivity and solubility characteristics of BHAP preclude its isolation, though its precursor showed appropriate n.m.r. and mass spectra, and elemental analysis.  Moreover, treatment of the ethereal solution of BHAP with diazomethane allowed mass spectrometric analysis of the resulting dimethyl ester of BHAP.  Dry ethereal solutions of BHAP appear to be stable indefinitely at 0C."

 - A.F.W. Coulson and J.R. Knowles, "Active-site-directed Inhibition of Trosephosphate Isomerase", Chemical Communications 7 (1970)

(And that 7 refers to the page number, not the volume.  Bizarre, I know.)

Here, they seem to be using the word ethereal to mean "dissolved in ether": sort of as "aqueous" means "dissolved in water".

Also, by "dry" ether, they mean "ether with no water in it" (whereas I would probably use the word "anhydrous").

Not sure whether the difficulty in vocabulary is coming from the fact that I'm reading out of field (organic chemistry, not biochemistry), or the fact that it's from 1970.