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Definition of: autotropism
(ô·tot′rə·piz′·əm) noun Bot. 
The tendency of the organs of a plant, uninfluenced from without, to grow in straight lines. [ <AUTO-1 + Gk. tropē a turning < trepein turn] 
—au·to·trop·ic (ô′tə·trop′ik) adjective
				
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