The Collaborative International Dictionary of English v.0.48:

Chelonethida \Chelonethida\ n.
   an order comprising the false scorpions.

   Syn: order Chelonethida, Pseudoscorpionida, order
        Pseudoscorpionida, Pseudoscorpiones, order
        Pseudoscorpiones.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Chelonethida
    n 1: false scorpions [syn: Chelonethida, order Chelonethida,
         Pseudoscorpionida, order Pseudoscorpionida,
         Pseudoscorpiones, order Pseudoscorpiones]