parasitoidism

[ par-uh-si-toi-diz-uh m, -sahy- ]
/ ˈpær ə sɪ tɔɪˌdɪz əm, -saɪ- /

noun

the feeding by certain insect larvae on host tissues such that the host remains alive until larval development is complete and then usually dies.

Origin of parasitoidism