ether
ee ther
- n the fifth and highest element after air and earth and fire and water; was believed to be the substance composing all heavenly bodies
- n any of a class of organic compounds that have two hydrocarbon groups linked by an oxygen atom
- n a medium that was once supposed to fill all space and to support the propagation of electromagnetic waves
- n a colorless volatile highly inflammable liquid formerly used as an inhalation anesthetic
- Is there such a thing as ether, as the old-school physicists assert and Einstein denies? If so, does the ether fill the universe, absolutely at rest and permeating freely through .
- The famed Michelson-Morley experiment of 1887, in which perpendicular beams of light were raced against each other, seemed to show that a light-carrying ether pervading all space .
- Soon, however, discrepancies with the idea of an all-pervading ether began to appear.