Definition of definitive host in English:

definitive host

noun

Biology
  • An organism that supports the adult or sexually reproductive form of a parasite.

    Compare with intermediate host
    • ‘Another parasite under suspicion for otter deaths is Sarcocystis neurona, whose only definitive host is the opossum.’
    • ‘The worms were using hyena and large cats as definitive hosts and bovids as intermediate hosts.’
    • ‘The next step in the typical, three-host life cycle invariably requires a predatory act by the definitive host.’
    • ‘Cats are considered the definitive host of toxoplasmosis.’
    • ‘Once in the definitive host's gut, the tapeworm larvae mature into adults and shed eggs, completing the cycle.’