Definition of Photatropic

Pho`to*trop"ic (?), a. [Photo- + Gr. &?; to turn.] (Bot.) Same as Heliotropic.

- Webster's Unabridged Dictionary (1913)

Having a tendency to move in response to light. An animal or microbe that is positively phototropic will move toward light. One that is negatively phototropic will move away from light.

- The Nuttall Encyclopedia

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The correct Spelling of this word is: Phototropic

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