heterogenetic parasite

het·er·o·ge·net·ic par·a·site

a parasite whose life cycle involves an alternation of generations.

het·er·o·ge·net·ic par·a·site

(het'ĕr-ō-jĕ-net'ik par'ă-sīt)
A parasite with a life cycle that involves an alternation of generations.