Definition of Lobachevsky, Nikolai in English:

Lobachevsky, Nikolai

proper noun

  • (1792–1856), Russian mathematician; full name Nikolai Ivanovich Lobachevsky. At about the same time as Gauss and János Bolyai(1802–60), he independently discovered non-Euclidean geometry.

Pronunciation:

Lobachevsky, Nikolai

/ləbəˈCHyefskyē//ˌlōbəˈCHefskē/