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The state or process of becoming green, especially the abnormal development of green coloration in plant parts, such as flowers, that are normally not green.
1. (Botany) (in plants) the process of becoming green, esp by the action of disease, etc, in parts not normally green
2. the condition of being or the process of becoming green
[C19: see virescent]
vi•res•cence(vaɪˈrɛs əns, vɪ-)
the state of becoming somewhat green due to the abnormal presence of chlorophyll.