ether drift
History of Science
noun
The expected movement of the earth or an observer through the ether, failure to detect which (in the Michelson–Morley experiment of 1887 and subsequently) led to the concept of the Lorentz contraction and eventually to Einstein's special theory of relativity.
Origin
Late 19th century; earliest use found in The Engineer.
- you can't (or can) talk (you shouldn't or should talk)
- you can't put an old head on young shoulders
- you can't teach an old dog new tricks
- you can't win them all (or win some, lose some)
- you could have fooled me!
- you could have knocked me (or her, him, etc.) down with a feather
- you couldn't make it up
- you'd
- you don't say (or you don't say so)!
- Youghiogheny River
- you have no idea
- you haven't lived!
- youing
- you know
- you know something (or what)?
- you-know-who (or you-know-what)
- you'll
- you may (or might) as well be hanged for a sheep as for a lamb
- you must be (or have to be) joking
- you must be (or have to be) kidding
- you name it
- you never know
- young
- young adult
- young adult offender