Definition of "ultraradical"

An ultraradical Wahhabi fringe group was headed by Ayub Omarov (aka Ayub Astrakhansky), a Dagestani Avar from the Tsumadinskii raion. He resided in Astrakhan, and organized his ultraradical group among the Dagestani diaspora in that area.

2015 , Robert Bruce Ware, Enver Kisriev, “The Islamic Factor: Revival and Radicalism”, in Dagestan: Russian Hegemony and Islamic Resistance in the North Caucasus, Abingdon: Routledge, page 98

The Bolsheviks (the name derives from the Russian for big, or majority) were the ultra-radical faction of the Russian Social Democratic Labor Party and the direct ancestor of the Communist Party of the Soviet Union.

2015 November 1, Hendrik Hertzberg, “That G.O.P. Debate: Two Footnotes”, in The New Yorker‎