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}.

Camel \Cam"el\, n. [Oe. camel, chamel, OF. camel, chamel, F.
   chameau L. camelus, fr. Gr. ?; of Semitic origin; cf. Heb.
   g[=a]m[=a]l, Ar. jamal. Cf. As. camel, fr. L. camelus.]
   1. (Zo["o]l.) A large ruminant used in Asia and Africa for
      carrying burdens and for riding. The camel is remarkable
      for its ability to go a long time without drinking. Its
      hoofs are small, and situated at the extremities of the
      toes, and the weight of the animal rests on the callous.
      The dromedary ({Camelus dromedarius}) has one bunch on the
      back, while the Bactrian camel ({C. Bactrianus}) has two.
      The llama, alpaca, and vicu[~n]a, of South America, belong
      to a related genus ({Auchenia}).

   2. (Naut.) A water-tight structure (as a large box or boxes)
      used to assist a vessel in passing over a shoal or bar or
      in navigating shallow water. By admitting water, the camel
      or camels may be sunk and attached beneath or at the sides
      of a vessel, and when the water is pumped out the vessel
      is lifted.

   {Camel bird} (Zo["o]l.), the ostrich.

   {Camel locust} (Zo["o]l.), the mantis.

   {Camel's thorn} (Bot.), a low, leguminous shrub ({Alhagi
      maurorum}) of the Arabian desert, from which exudes a
      sweetish gum, which is one of the substances called manna.

Source : WordNet®

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