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Noun
1. tropismSee also 傾性
Wikipedia definition
2. TropismA tropism (from Greek τροπή, trope, "a turning") is a biological phenomenon, indicating growth or turning movement of a biological organism, usually a plant, in response to an environmental stimulus. In tropisms, this response is dependent on the direction of the stimulus (as opposed to nastic movements which are non-directional responses).
Read “Tropism” on English Wikipedia
Read “屈性” on Japanese Wikipedia
Read “Tropism” on DBpedia

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