endozoic

from WordNet (r) 3.0 (2006)

endozoic
    adj 1: living within a living animal usually as a parasite;
           "entozoic worms" [syn: {entozoic}, {entozoan},
           {endozoic}] [ant: {epizoic}]

from The Collaborative International Dictionary of English v.0.48

endozoic \en`do*zo"ic\ ([e^]n`d[-o]*z[=o]"[i^]k), adj.
   Living within a living animal, usually as a parasite; as,
   endozoic worms. Contrasted with {epizoic}.

   Syn: entozoic, entozoan.
        [WordNet 1.5]