ether

Noun

• a colorless volatile highly inflammable liquid formerly used as an inhalation anesthetic

• a medium that was once supposed to fill all space and to support the propagation of electromagnetic waves

• any of a class of organic compounds that have two hydrocarbon groups linked by an oxygen atom

• the fifth and highest element after air and earth and fire and water; was believed to be the substance composing all heavenly bodies

Related words

• Synonyms: 
  ethoxyethane , divinyl ether , vinyl ether , diethyl ether , ethyl ether , aether , quintessence