umbra

umbra
[ˈʌmbrə]
(pl. umbras umbrae -briː)
  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
    暗影;本影。 比较penumbra
    ■(Astronomy)the dark central part of a sunspot
    (天文)太阳黑子中心
    ■[mass noun](chiefly poetic/literary)shadow or darkness
    (主诗/文)荫,阴影
派生
umbral
adjective
语源
  1. late 16th cent. (denoting a phantom or ghost): from Latin, literally shade'
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