Webster's Revised Unabridged Dictionary · 1913

Zouave

Zouave (?; 277) , noun

[French, from Arabic Zouaoua a tribe of Kabyles living among the Jurjura mountains in Algeria.]

(a)
(Military) One of an active and hardy body of soldiers in the French service, originally Arabs, but now composed of Frenchmen who wear the Arab dress.
(b)
(Military) Hence, one of a body of soldiers who adopt the dress and drill of the Zouaves, as was done by a number of volunteer regiments in the army of the United States in the Civil War, 1861-65.