Source : Webster's Revised Unabridged Dictionary (1913)

Entozoal \En`to*zo"al\, Entozoic \En`to*zo"ic\, a. (Zo["o]l.)
   Pertaining to, or consisting of, the Entozoa.

Source : WordNet®

entozoic
     adj : living within a living animal usually as a parasite;
           "entozoic worms" [syn: {entozoan}, {endozoic}] [ant: {epizoic}]