Source : Webster's Revised Unabridged Dictionary (1913)

Dromedary \Drom"e*da*ry\ (dr[u^]m"[-e]*d[asl]*r[y^]), n.; pl.
   {Dromedaries}. [F. dromadaire, LL. dromedarius, fr. L. dromas
   (sc. camelus), fr. Gr. droma`s running, from dramei`n, used
   as aor. of tre`chein to run; cf. Skr. dram to run.]
   (Zo["o]l.)
   The Arabian camel ({Camelus dromedarius}), having one hump or
   protuberance on the back, in distinction from the {Bactrian
   camel}, which has two humps.

   Note: In Arabia and Egypt the name is restricted to the
         better breeds of this species of camel. See {Deloul}.