Galvanotropism :: Galvanotropism (n.) The tendency of a root to place its axis in the line of a galvanic current.
Monotropa :: Monotropa (n.) A genus of parasitic or saprophytic plants including the Indian pipe and pine sap. The name alludes to the dropping end of the stem.
Organotrophic :: Organotrophic (a.) Relating to the creation, organization, and nutrition of living organs or parts..