The organism on or in which a parasite lives during an immature stage.
Webster's New World
Intermediate Host Sentence Examples
Before the end of the 19th century this discovery of the blood parasite of malaria was crowned by the hypothesis of Patrick Manson, proved by Ronald Ross, that malaria is propagated by a certain genus of gnat, which acts as an intermediate host of the parasite.
The embryo is provided with ten hooks, and appears to select Lamellibranchs (Mactra) for its intermediate host.
Such is the general history of Cestodes whose intermediate host is an Invertebrate.
The ciliated larva escapes from the egg into the water and enters an intermediate host (leech, mollusc, arthropod, batrachian or fish) where it undergoes a metamorphosis into a second stage in which most of the adult organs are present.
Unlike the tapeworm no intermediate host is required for the development of this worm.