| 单词 | phototropism | 
| 释义 | phototropism [fō`tä·trǝ´piz·ǝm]  BOTANY A growth-mediated response of a plant to stimulation by visible light.  SOLID-STATE PHYSICS A reversible change in the structure of a solid exposed to light or other radiant energy, accompanied by a change in color. Also known as phototropy.  | 
	
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