Found 1 items, similar to phototonus.
English → English (gcide) Definition: Phototonus Phototonus \Pho*tot"o*nus\, n. [NL. See Photo-, and Tone.] 1. (Bot.) A motile condition in plants resulting from exposure to light. -- Pho`to*ton"ic, a. [1913 Webster] 2. (Physiol.) An irritable condition of protoplasm, resulting in movement, due to a certain intensity of light. -- Pho`to*ton"ic, a. [Webster 1913 Suppl.]