Lobachevsky

[ loh-buh-chef-skee; Russian luh-buh-chyef-skyee ]
/ ˌloʊ bəˈtʃɛf ski; Russian lə bʌˈtʃyɛf skyi /

noun

Ni·ko·lai I·va·no·vich [nyi-kuh-lahy ee-vah-nuh-vyich] /nyɪ kʌˈlaɪ iˈvɑ nə vyɪtʃ/,1793–1856, Russian mathematician.

British Dictionary definitions for lobachevsky

Lobachevsky
/ (Russian ləbaˈtʃɛfskij) /

noun

Nikolai Ivanovich (nikaˈlaj iˈvanəvitʃ). 1793–1856, Russian mathematician; a founder of non-Euclidean geometry