definitive host
Noun
Meaning
the host in which the sexual reproduction of a parasite takes place
Source: WordNetHypernyms
Examples
When the definitive host eats infested and raw or undercooked meat from an intermediate host, the worm's scolex pops out and attaches itself to the gut, and the adult tapeworm develops.
The definitive host in which adults develop is a land vertebrate, the earliest host of juvenile stages is usually a snail that may live on land or in water, and in many cases a fish or arthropod is the second host.
For indirect parasites, there will always be a definitive host and an intermediate host. citation citation Human head lice ( Pediculus humanus capitis ) are ectoparasites.