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Word: penumbra (lookup usage) (lookup stats)


Meaning:

Noun:

  • A partially shaded area around the edges of a shadow, especially an eclipse.
  • A region around the edge of a sunspot, darker than the sun's surface but lighter than the middle of the sunspot.
  • medicine ''(in "ischaemic penumbra", after a stroke)'' A region of the brain that has lost only some of its blood supply, and retains structural integrity but has lost function.
  • Something implied by, the existence of something else that is necessary for the second thing to be full and complete in its essential aspects.

Source: Wiktionary | Src Info »