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(pe-num-bra) 3 syllables

Definition

noun. the partially shaded outer region of a shadow.

Example Sentence

An observer in the penumbra experiences a partial eclipse.

More Example Sentences

A penumbra forms around the full moon.

Synonyms

shadow; shade; gloom

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penumbra
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Rhymes

  • lumbra
  • umbra

  • penumbra
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