umbral

umbral — adjective

  • umbralpositive
  • more umbralcomparative
  • most umbralsuperlative

1. describes the fully dark inner part of a shadow where all direct light from a so

1.形容詞C2
釋義

describes the fully dark inner part of a shadow where all direct light from a source is completely blocked — used especially in astronomy when talking about the moon's shadow during a total solar eclipse, or the dark centre of a sunspot.

例句

In 2024, Carbondale lay in the umbral path of the eclipse for over two minutes.

umbral path — the track of a total eclipse shadow

Mayumi studied the umbral zone of the sunspot through a filtered telescope.

umbral zone — darkest part of a sunspot

同義詞
  • shadowy

    general everyday word for filled with shadows; less precise than umbral

  • dark

    broadest term for absence of light; not specific to a shadow's geometry

  • shaded

    describes an area sheltered from direct light; does not imply total blockage

反義詞
  • lit

    receiving direct light rather than being in shadow

  • penumbral

    partly shaded rather than fully dark; the outer, lighter part of a shadow

文法句型

umbral + noun (umbral region, umbral shadow)

用法筆記

This adjective appears almost exclusively before a noun (attributive position) and is most common in astronomy and optics writing. The general sense 'darkened' or 'shaded' is rare in everyday English—for ordinary darkness, use shadowy or dark instead.

常見錯誤

❌The room was umbral after sunset.
✅The room was dark after sunset.
💡umbral is a technical term for the fully shaded inner part of a shadow; it is not a synonym for ordinary darkness.