penumbra
Definition from Wiktionary, a free dictionary
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[edit] English
[edit] Etymology
From Latin paene (“‘almost’”) + umbra (“‘shadow’”).
[edit] Pronunciation
- enPR: pĭ-nŭm'brə
[edit] Noun
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Singular |
Plural |
penumbra (plural penumbras)
- 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.
- Something related to, connected to, and implied by, the existence of something else that is necessary for the second thing to be full and complete in its essential aspects.
- 1965, William O. Douglas, Griswold v. Connecticut, United States Reports, 381 U.S. 479
- The foregoing [United States Supreme Court] cases suggest that specific guarantees in the Bill of Rights have penumbras, formed by emanations from those guarantees that help give them life and substance.
- 1965, William O. Douglas, Griswold v. Connecticut, United States Reports, 381 U.S. 479
- (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.
[edit] Translations
partially shaded area around a shadow, especially an eclipse
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region around a sunspot
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Translations to be checked
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[edit] External links
[edit] Portuguese
[edit] Noun
pe.num.bra f.
- situation of low light
