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1. Oxford Dictionary

   umbra

   • IPA[ˈʌmbrə]

   英式

   • n.
     the fully shaded inner region of a shadow cast by an opaque object, especially the area on the earth or moon experiencing the total phase of an eclipse.；the dark central part of a sunspot.

   • noun: umbra, plural noun: umbrae

2. • 釋義

   n.

   名詞

   • 1. the fully shaded inner region of a shadow cast by an opaque object, especially the area on the earth or moon experiencing the total phase of an eclipse.
   • ▪ the dark central part of a sunspot.
   • 2. literary shadow or darkness an impenetrable umbra seemed to fill every inch of the museum