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Short "hint"

n. - A fringe region of partial shadow around an umbra.

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Usage examples (37)
  • The penumbra is the pale outer portion of the Earth's shadow.
  • It does enter a region of space called the penumbra, in which the Earth partially blocks the Sun.
  • The next circle is less dark, and called the penumbra, because it so closely resembles the penumbra.
  • And a penumbra is a different kettle of fish entirely–the metaphor was used by Justice Douglas in Griswold v.
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