entozoan

noun

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

   Synonym:    endoparasiteentoparasiteentozoonendozoan

adj

1. living within a living animal usually as a parasite
   1. entozoic worms

   Synonym:    entozoicendozoic

2. of or relating to entozoa

   Synonym:    endozoan