ether

nouns

the fifth and highest element after air and earth and fire and water; was believed to be the substance composing all heavenly bodies
is derived from
any of a class of organic compounds that have two hydrocarbon groups linked by an oxygen atom
is derived from
is a type of (narrower)
any compound of carbon and another element or a radical
a medium that was once supposed to fill all space and to support the propagation of electromagnetic waves
a colorless volatile highly inflammable liquid formerly used as an inhalation anesthetic
is derived from
is derived from
is derived from