Source : Webster's Revised Unabridged Dictionary (1913)

Linguatulina \Lin*guat`u*li"na\
   (l[i^][ng]*gw[a^]t`[-u]*l[imac]"n[.a]), n. pl. [NL., fr. L.
   lingua tongue.] (Zo["o]l.)
   An order of wormlike, degraded, parasitic arachnids. They
   have two pairs of retractile hooks, near the mouth. Called
   also {Pentastomida}.

   Note: The adults of some species inhabit the nostrils and
         nasal sinuses of dogs and other carnivores. The young,
         after being swallowed by sheep, rabbits, etc., find
         their way to the lungs and liver and become encysted.
         These, when eaten by carnivores, develop into the adult
         forms.