hemiparasitic

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hem·i·par·a·site

H0144600 (hĕm′ĭ-păr′ə-sīt′)n. A plant, such as mistletoe, that obtains some nourishment from its host but also photosynthesizes. Also called semiparasite.
hem′i·par′a·sit′ic (-sĭt′ĭk) adj.
Thesaurus
Adj.1.hemiparasitic - of or relating to plants that are hemiparasites