English
Friedmannian
From Friedmann + -ian.
Today it means
adj Of or relating to Alexander Friedmann (Russian: Алекса́ндр Фри́дман; 1888–1925), Russian and Soviet physicist and mathematician known for his pioneering theory that the universe was expanding according to a set of equations.
Language periods are conventional ranges, not dates for this word.
Etymograph / Friedmannian