搜尋結果
penumbra
- IPA[pəˈnəmbrə]
美式
- the partially shaded outer region of the shadow cast by an opaque object.;the shadow cast by the earth or moon over an area experiencing a partial eclipse.
noun: penumbra, plural noun: penumbrae
- 釋義
名詞
- 1. the partially shaded outer region of the shadow cast by an opaque object.
- ▪ the shadow cast by the earth or moon over an area experiencing a partial eclipse.
- ▪ the less dark outer part of a sunspot, surrounding the dark core.