Akademik

dervish

n. a member of any of several Muslim fraternities vowed to poverty and austerity.
Phrases and idioms:
whirling (or dancing or howling) dervish a dervish performing a wild dance, or howling, according to which sect he belongs to.
Etymology: Turk. dervis f. Pers. darvesh poor, a mendicant

Useful english dictionary. 2012.