It is often used in scientific terms related to nutrition and growth, such as:
* Autotroph: An organism that produces its own food through photosynthesis (like plants).
* Heterotroph: An organism that gets its nourishment by consuming other organisms (like animals).
* Trophic level: The position of an organism in a food chain, based on its dietary habits.
So, whenever you see "troph" in a word, think of nourishment or feeding.