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1. Any of a class of organic compounds that have two hydrocarbon groups linked by an oxygen atom
    
2. A colourless volatile highly flammable liquid formerly used as an inhalation anaesthetic
   - ethoxyethane, divinyl ether, vinyl ether, diethyl ether, ethyl ether
    
3. A cryptocurrency generated by the Ethereum protocol
   - Ether, ETH
    
4. A medium that was once supposed to fill all space and to support the propagation of electromagnetic waves
   - aether
    
5. [archaic] The fifth and highest element after air and earth and fire and water; was believed to be the substance composing all heavenly bodies
   - quintessence [archaic]

Derived forms: ethers

Type of: crypto [informal], cryptocurrency, element, inhalation anaesthetic, inhalation anesthetic, inhalation general anaesthetic, inhalation general anesthetic, medium, organic compound

Encyclopedia: Ether