Source : Webster's Revised Unabridged Dictionary (1913)

Spiny \Spin"y\, a. [From {Spine}.]
   1. Full of spines; thorny; as, a spiny tree.

   2. Like a spine in shape; slender. ``Spiny grasshoppers sit
      chirping.'' --Chapman.

   3. Fig.: Abounding with difficulties or annoyances.

            The spiny deserts of scholastic philosophy. --Bp.
                                                  Warburton.

   {Spiny lobster}. (Zo["o]l.) Same as {Rock lobster}, under
      {Rock}. See also {Lobster}.

Source : WordNet®

spiny lobster
     n 1: warm-water lobsters without claws; those from Australia and
          South Africa usually marketed as frozen tails; caught
          also in Florida and California [syn: {langouste}, {rock
          lobster}, {crayfish}]
     2: large edible marine crustacean having a spiny carapace but
        lacking the large pincers of true lobsters [syn: {langouste},
         {rock lobster}, {crawfish}, {crayfish}, {sea crawfish}]