Definition of "trophotropism" []

• In biology, the growth or movement of organisms in relation to a source or supply of food; a form of chemotropism. (noun)
• In botany, the phenomena induced in a growing organ by the influence of the chemical nature of its environment, as when plasmodia that are spread out on surfaces which yield little or no nutriment move toward bodies which contain nutrient substances. (noun)

The Century Dictionary (Public Domain)