noun

- A theory that seeks to unify the force of electromagnetism as described by Maxwell's equations and the force of gravity as described by general relativity, explaining each as manifestations of a single fundamental force and introducing a hypothetical fifth dimension.
- Any of various physical theories introducing dimensions additional to the four dimensions of space and time.

Origin of Kaluza-Klein theory

*After Theodor*

*Kaluza*

*(1885-1954), German mathematician and physicist*

*and Oskar*

*Klein*

*(1894-1977), Swedish physicist*