Definition of Lobachevsky, Nikolai Ivanovich in English:

Lobachevsky, Nikolai Ivanovich

proper noun

  • (1792–1856), Russian mathematician. At about the same time as Gauss and János Bolyai(1802–60), he independently discovered non-Euclidean geometry. His work was not widely recognized until the non-Euclidean nature of space–time was revealed by the general theory of relativity.

Pronunciation:

Lobachevsky, Nikolai Ivanovich

/ˌlɒbəˈtʃɛfski/