noun
theory of relativity
Physics term referring to Einstein's theories of special and general relativity. Often abbreviated as 相対論.
See also: 相対論 (そうたいろん)
アインシュタインは相対性理論を発表した。
Einstein published the theory of relativity.
Abbreviation of 相対性理論, used in the same physics context but slightly more casual or abbreviated.
Compound of 相対性 (relativity) and 理論 (theory), a calque from the English 'theory of relativity'.