- Zool. an organism that may be either free-living or parasitic; facultative parasite
- Bot. a parasitic plant, as the mistletoe, which carries on some photosynthesis but obtains a portion of its food, water, or minerals from a host plant
A plant, such as mistletoe, that obtains some nourishment from its host but also photosynthesizes. Also called semiparasite.
hemi- + parasite