entozoan

Adjective

• living within a living animal usually as a parasite
  • entozoic worms
    

• of or relating to entozoa

Noun

• any of various parasites that live in the internal organs of animals (especially intestinal worms)

Related words

• Synonyms: 
  entozoic , endozoic , endozoan , endoparasite , entoparasite , entozoon