Dictionary: hemiparasite   (hĕm'ĭ-păr'ə-sīt')

1. A plant, such as mistletoe, that obtains some nourishment from its host but also photosynthesizes. Also called semiparasite.
2. An organism that can live either independently or as a parasite.

The noun has one meaning:

Meaning #1: a parasitic plant that contains some chlorophyll and therefore is capable of photosynthesis