paratrophic

par·a·troph·ic

(par'ă-trof'ik),
Deriving sustenance from living organic material.
See also: metatrophic, prototrophic.
[para- + G. trophē, nourishment]

paratrophic

(păr″ă-trō′fĭk) [″ + trophe, nourishment]
1. Requiring a living organism for food; parasitic.
2. Pert. to abnormal nutrition.