definitive host

(ecology) The host in which a parasite reproduces sexually.

日本語の意味

（生態学用語）寄生虫が性的繁殖を行う宿主、すなわち最終宿主

The fox serves as the definitive host for several intestinal parasites that complete their life cycles only in canids.

キツネは、いくつかの腸寄生虫が有性生殖を行い、生活環を完結する最終宿主として機能する。

意味（1）

(ecology) The host in which a parasite reproduces sexually.

Cats are the definitive host of Toxoplasma gondii.

definitive hosts

（ plural ）