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| nyc·ti·nas·ty [ níktə nàstee ] (plural nyc·ti·nas·ties) |
noun |
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| Definition: |
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plant movement caused by darkness: a movement of a plant or plant part in response to the onset of darkness, e.g. the shutting of the petals of a flower at night
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| [Mid-20th century. < Greek nukt- "night"] |
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