Sleep movement

the folding together of leaflets, petals, etc, that occurs at night in certain plants, such as the prayer plant (Maranta leuconura)


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    sleep in sleep on something Consider something overnight before deciding, as in I don’t know if I want to go on such a long hike; let me sleep on it. This usage was first recorded in 1519 in the state papers of King Henry VIII: “His Grace … said that he would sleep and dream […]

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