天空醚, 大氣, 蒼天, [物]以太1. a colorless volatile highly inflammable liquid formerly used as an inhalation anesthetic
同義詞：ethoxyethane, divinyl ether, vinyl ether, diethyl ether, ethyl ether
2. the fifth and highest element after air and earth and fire and water; was believed to be the substance composing all heavenly Bodies
同義詞：quintessence
3. any of a class of organic compounds that have two hydrocarbon groups linked by an oxygen atom
4. a medium that was once supposed to fill all space and to support the propagation of electromagnetic waves
同義詞：aether
