The Collaborative International Dictionary of English v.0.48:

Dromedary \Drom"e*da*ry\ (dr[u^]m"[-e]*d[asl]*r[y^]), n.; pl.
   Dromedaries (-r[i^]z). [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.] (Zool.)
   The Arabian camel (Camelus dromedarius), having one hump or
   protuberance on the back, in distinction from the Bactrian
   camel, which has two humps.
   [1913 Webster]

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

WordNet (r) 3.0 (2006):

dromedary
    n 1: one-humped camel of the hot deserts of northern Africa and
         southwestern Asia [syn: Arabian camel, dromedary,
         Camelus dromedarius]

Moby Thesaurus II by Grady Ward, 1.0:

49 Moby Thesaurus words for "dromedary":
   Cape elk, Siberian husky, Virginia deer, antelope, ass,
   beast of burden, buck, camel, camelopard, caribou, deer, deerlet,
   doe, draft animal, eland, elephant, elk, fallow deer, fawn,
   gazelle, giraffe, gnu, hart, hartebeest, hind, horse, husky, kaama,
   llama, malamute, moose, mule, mule deer, musk deer, okapi, ox,
   pack horse, red deer, reindeer, roe, roe deer, roebuck, sledge dog,
   springbok, stag, sumpter, sumpter horse, sumpter mule,
   wildebeest



Easton's 1897 Bible Dictionary:

Dromedary
   (Isa. 60:6), an African or Arabian species of camel having only
   one hump, while the Bactrian camel has two. It is distinguished
   from the camel only as a trained saddle-horse is distinguished
   from a cart-horse. It is remarkable for its speed (Jer. 2:23).
   Camels are frequently spoken of in partriarchal times (Gen.
   12:16; 24:10; 30:43; 31:17, etc.). They were used for carrying
   burdens (Gen. 37:25; Judg. 6:5), and for riding (Gen. 24:64).
   The hair of the camel falls off of itself in spring, and is
   woven into coarse cloths and garments (Matt. 3:4). (See CAMEL.)