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单词 nyctitropism
释义

Collins Concise English Dictionary © HarperCollins Publishers::
nyctitropism /nɪkˈtɪtrəˌpɪzəm/ n
  1. a tendency of some plant parts to assume positions at night that are different from their daytime positions
Etymology: 19th Century: nyct-, from Greek nukt-, nux night + -tropism
WordReference Random House Unabridged Dictionary of American English © 2024
nyc•ti•trop•ic  (nik′ti tropik, -trōpik),USA pronunciation adj. [Bot.]
  1. Botanytending to assume at or just before nightfall positions unlike those maintained during the day, as the leaves or flowers of certain plants.
  • 1875–80; nycti- + -tropic
nyc•tit•ro•pism  (nik titrə piz′əm),USA pronunciation n. 
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更新时间:2025/7/23 13:34:45