intermediate host n
1) a host which is normally used by a parasite in the course of its life cycle and in which it may multiply asexually but not sexually compare DEFINITIVE HOST
* * *
a host in which a parasite passes through one or more of its asexual stages (protozoa) or larval stages (helminths); if there is more than one, the stages may be designated first, second, and so on.Medical dictionary. 2011.