| 单词 | tropism | 
| 释义 | Word Frequency tropism(ˈtrəʊpɪzəm) noun the response of an organism, esp a plant, to an external stimulus by growth in a direction determined by the stimulus Derived forms tropismatic (ˌtropisˈmatic) adjective tropistic (trəʊˈpɪstɪk)  adjective Word origin from Greek tropos a turnWord Frequency -tropism or -tropy combining form in countable noun indicating a tendency to turn or develop in response to a certain stimulus  phototropism Word origin from Greek tropos a turn | 
	
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