1. Living or occurring within the body of an animal; parasitic or symbiotic within a host organism.
Usage: biology; formal

Examples

• The endozoic tapeworm lives inside the intestines of its host.
• Endozoic parasites are often more difficult to detect than external parasites.
• Many endozoic organisms have evolved specialized adaptations to survive in their host's digestive system.
• The study of endozoic fauna requires careful examination of internal organs.
• Some endozoic bacteria form mutualistic relationships with their hosts.