Man·tis n.  Zool. Any one of numerous species of voracious orthopterous insects of the genus Mantis, and allied genera. They are  predacious long-bodied large-eyed insects of warm regions, are remarkable for their slender grotesque forms, and for holding their stout anterior legs in a manner suggesting hands folded in prayer. The common American species is Mantis Carolina.
  Mantis shrimp. Zool. The Squilla, a tropical marine burrowing crustacean with large grasping appendages.  Also called mantis crab and mantis prawn.
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  mantis crab
       n : tropical marine burrowing crustaceans with large grasping
           appendages [syn: mantis shrimp]