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Penumbra

Nghe phát âm
( Xem từ này trên từ điển Anh Việt)

Mục lục

Noun, plural -brae

Astronomy .
the partial or imperfect shadow outside the complete shadow of an opaque body, as a planet, where the light from the source of illumination is only partly cut off. Compare umbra ( def. 3a ) .
the grayish marginal portion of a sunspot. Compare umbra ( def. 3b ) .
a shadowy, indefinite, or marginal area.

Synonyms

noun
shadow , umbra , umbrage

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