The Collaborative International Dictionary of English v.0.48:

Dabb \Dabb\ (d[.a]b), n. (Zool.)
   A large, spine-tailed lizard (Uromastix spinipes), found in
   Egypt, Arabia, and Palestine; -- called also dhobb, and
   dhubb.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Dubb \Dubb\, n. [Ar.] (Zool.)
   The Syrian bear. See under Bear. [Written also dhubb, and
   dub.]
   [1913 Webster]