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BNC: 41556 COCA: 28764

penumbra

noun
/pəˈnʌmbrə/
/pəˈnʌmbrə/
(specialist)
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  1. an area of shadow which is between fully dark and fully light(黑暗与光明之间的)半影
  2. (astronomy天文学) the shadow made by the earth or the moon during a partial eclipse(偏食期间的)半影 compare umbraTopics Spacec2
  3. Word Originmid 17th cent.: modern Latin, from Latin paene ‘almost’ + umbra ‘shadow’.
BNC: 41556 COCA: 28764
BNC: 41556 COCA: 28764
BNC: 41556 COCA: 28764

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