hemiparasite Syllabification: (hem·i·par·a·site)Pronunciation: /ˌheməˈparəˌsīt/Definition of hemiparasite noun Botany a plant that obtains or may obtain part of its food by parasitism, e.g., mistletoe, which also photosynthesizes. hemiparasite in other Oxford dictionaries Definition of hemiparasite in the British & World English dictionary