The Collaborative International Dictionary of English v.0.48:

Cricket \Crick"et\ (kr?k"?t), n. [OE. criket, OF. crequet,
   criquet; prob. of German origin, and akin to E. creak; cf. D.
   kriek a cricket. See Creak.] (Zool.)
   An orthopterous insect of the genus Gryllus, and allied
   genera. The males make chirping, musical notes by rubbing
   together the basal parts of the veins of the front wings.
   [1913 Webster]

   Note: The common European cricket is Gryllus domesticus;
         the common large black crickets of America are Gryllus
         niger, Gryllus neglectus, and others.
         [1913 Webster]

   Balm cricket. See under Balm.

   Cricket bird, a small European bird (Silvia locustella);
      -- called also grasshopper warbler.

   Cricket frog, a small American tree frog (Acris gryllus);
      -- so called from its chirping.
      [1913 Webster]

WordNet (r) 3.0 (2006):

cricket frog
    n 1: either of two frogs with a clicking call