Guesd"ist

from The Collaborative International Dictionary of English v.0.48

Geusdism \Geusd"ism\ (g[e^]d"[i^]z'm), prop. n.
   The Marxian socialism and programme of reform through
   revolution as advocated by the French political leader Jules
   Basile Guesde (pron. g[e^]d) (1845- ). -- {Guesd"ist}, n. &
   a.
   [Webster 1913 Suppl.]