| 单词 | phototonus |
| 释义 | phototonus in British English (fəʊˈtɒtənəs) noun the condition of plants that enables them to respond to the stimulus of light Derived forms phototonic (ˌfəʊtəʊˈtɒnɪk) adjective Word origin C19: from photo- + Greek tonos tonephototonus in American English (foʊˈtɑtənəs) noun Biology the state of being responsive to or irritated by exposure to light Derived forms phototonic (ˌphotoˈtonic) (ˌfoʊtoʊˈtɑnɪk) adjective Word origin ModL: see photo- & tone |
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