Source : Webster's Revised Unabridged Dictionary (1913)

Pseudoscorpiones \Pseu`do*scor`pi*o"nes\, n. pl. [NL. See
   {Pseudo-}, and {Scorpion}.] (Zo["o]l.)
   An order of Arachnoidea having the palpi terminated by large
   claws, as in the scorpions, but destitute of a caudal sting;
   the false scorpions. Called also {Pseudoscorpii}, and
   {Pseudoscorpionina}. See Illust. of {Book scorpion}, under
   Book.

Source : WordNet®

Pseudoscorpiones
     n : false scorpions [syn: {Chelonethida}, {order Chelonethida},
         {Pseudoscorpionida}, {order Pseudoscorpionida}, {order
         Pseudoscorpiones}]