Source : Webster's Revised Unabridged Dictionary (1913)

Isopod \I"so*pod\, a. (Zo["o]l.)
   Having the legs similar in structure; belonging to the
   Isopoda. -- n. One of the Isopoda.

Source : WordNet®

isopod
     n : any of various small terrestrial or aquatic crustaceans with
         seven pairs of legs adapted for crawling