'ಟ್ರೋಪಿಸಂ' ಹೆಚ್ಚಾಗಿ ಇದಕ್ಕೆ ಸಂಬಂಧಿಸಿದೆ:

Tropism is the directional growth of a plant part in response to a stimulus – towards light (phototropism), gravity (geotropism) or water (hydrotropism).