The Collaborative International Dictionary of English v.0.48:

Deloul \De*loul"\ (d[asl]*l[=oo]l"), n. [Prob. of Arabic or
   Bedouin origin.] (Zool.)
   A special breed of the dromedary used for rapid traveling;
   the swift camel; -- called also herire, and maharik.
   [1913 Webster]