WordReference Random House Unabridged Dictionary of American English © 2026
Fried′mann mod′el
(frēd′mən),USA pronunciation [Astron.]
- Astronomyany model of the universe deduced from a homogeneous, isotropic solution of Einstein's field equations without a cosmological constant. Such models form the mathematical basis for many modern cosmologies and provide for expansion or contraction of the universe. Also called Fried′mann u′niverse.
- named after Alexander Friedmann, (1885–1925), Russian mathematician, who made the necessary calculations in 1922