单词 | phototonus |
释义 | phototonus —phototonic /foh'teuh ton"ik/, adj. /foh tot"n euhs/, n. Biol. 1. the normal condition of sensitiveness to light in organisms or their organs. 2. the irritability exhibited by cytoplasm when exposed to light of a certain intensity. [1870-75; PHOTO- + TONUS] |
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