[1] : The Collaborative International Dictionary of English v.0.48

gerbil \ger"bil\ j~er"bi^l, gerbille \ger`bille"\
   zhaslr`b-el", n. f. gerbille. cf. jerboa.
   1. zool. one of several species of small, jumping, murine
      burrowing rodents, of the genus gerbillus and related
      genera of the subfamily gerbillinae. they have long soft
      pale fur and hind legs adapted for leaping. in their
      leaping powers they resemble the jerboa. they inhabit
      africa, india, and southern europe.
      1913 webster + wordnet 1.5

   2. zool. a rodent meriones unguiculatus of the
      subfamily gerbillinae that is commonly kept as a pet; it
      is also called the tamarisk gerbil, sand rat and
      jird. its natural habitats are the dry regions of
      northern africa and asia.
      pjc
see also:
jerboa gerbillus gerbillinae meriones unguiculatus tamarisk gerbil sand rat 
jird 

[2] : WordNet (r) 2.0

tamarisk gerbil
     n : a gerbil that is popular as a pet syn: meriones
         unguiculatus
see also:
meriones unguiculatus 

Tamarisk >> T Words
Tamarisk, definition of term: Tamarisk
tamarisk_pag1.html

Gerbil >> G Words
Gerbil, definition of term: Gerbil
gerbil_pag1.html