Definition of intermediate host in US English:
 intermediate host
nounˈˌin(t)ərˈˌmēdēət hōst
Biology An organism that supports the immature or nonreproductive forms of a parasite.
Compare with definitive host
 Example sentencesExamples
-  Their life cycles depend on domesticated cattle and swine as intermediate hosts.
 -  Our biggest nightmare is that an intermediate host is out there carrying the virus and passing it onto other animals.
 -  That the mosquito was the intermediate host of the filarial parasite was a momentous discovery in 1877.
 -  Cats are the usual final host of this protozoan; but other mammals - including humans - and birds, can become intermediate hosts.
 -  This is because snails are the intermediate host to the parasite, which is released into shallow water, and then infects ducks and people.