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   penumbra

   /pɪˈnʌmbrə/

   noun

   • 1. the partially shaded outer region of the shadow cast by an opaque object.
   • ▪ the shadow cast by the earth or moon over an area experiencing a partial eclipse.
   • ▪ the less dark outer part of a sunspot, surrounding the core.
   • 2. a peripheral or indeterminate area or group: "an immense penumbra of theory surrounds any observation"

   Word Origin mid 17th century: modern Latin, from Latin paene ‘almost’ + umbra ‘shadow’.

   Derivatives

   • 1. penumbral adjective

   Scrabble Points: 14

   • P

     3

   • E

     1

   • N

     1

   • U

     1

   • M

     3

   • B

     3

   • R

     1

   • A

     1

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2. People also ask

   What does Penumbra mean?

   • Get a quick, free translation! PENUMBRA definition: 1. a part of a shadow in which only some of the light is blocked, used especially about a shadow…. Learn more.

   PENUMBRA | English meaning - Cambridge Dictionary

   dictionary.cambridge.org/dictionary/english/penumbra

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   What is a penumbra in astrology?

   • , plural pe·num·brae [pi-, nuhm, -bree],pe·num·bras. Astronomy. the partial or imperfect shadow outside the complete shadow of an opaque body, as a planet, where the light from the source of illumination is only partly cut off. Compare umbra ( def 3a ). the grayish marginal portion of a sunspot. Compare umbra ( def 3b ). a penumbra of secrecy.

   PENUMBRA Definition & Meaning | Dictionary.com

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   Where did the word Penumbra come from?

   • penumbra before Griswold.4 Astronomer Johannes Kepler coined the word penumbra in 1604 from the Latin words paene, meaning almost, and umbra, for shadow.

   A Footnote to 'Penumbra' in Griswold V. Connecticut

   scholarship.law.umn.edu/cgi/viewcontent.cgi?article=1409&context=concomm

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   What is a mysterious Penumbra?

   • A mysterious penumbra began to form beneath the trees. As here represented, there are formed complete shadows, called umbras; and partial shadows, called penumbras. The next circle is less dark, and called the penumbra, because it so closely resembles the penumbra.

   PENUMBRA | definition in the Cambridge English Dictionary

   dictionary.cambridge.org/us/dictionary/english/penumbra

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3. dictionary.cambridge.org › dictionary › englishPENUMBRA | English meaning - Cambridge Dictionary

   dictionary.cambridge.org › dictionary › english

   • Cached

   PENUMBRA definition: 1. a part of a shadow in which only some of the light is blocked, used especially about a shadow…. Learn more.

   • English (US)

     PENUMBRA meaning: 1. a part of a shadow in which only some...

   • Znaczenie Penumbra, Definicja W Cambridge English Dictionary

     penumbra definicja: 1. a part of a shadow in which only some...

   • Penumbra: Indonesian Translation

     penumbra translate: penumbra, penumbra. Learn more in the...

   • Penumbra in Spanish

     PENUMBRA translate: penumbra, Penumbra, Penumbra. Learn more...

4. www.merriam-webster.com › dictionary › penumbraPenumbra Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › penumbra

   • Cached

   penumbra: [noun] a space of partial illumination (as in an eclipse) between the perfect shadow on all sides and the full light. a shaded region surrounding the dark central portion of a sunspot.

5. Videos

   • 

     3:08

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     Umbra & Penumbra Lesson for Kids: Definition & Facts

     10 Aug 2020

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     5:50

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     Penumbra Explanation

     15 Feb 2014

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     7:16

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     🔵 Penumbra Meaning - Penumbra Defined - Penumbra Examples - Semi Formal Vocabulary - Penumbra

     18 Nov 2022

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6. www.dictionary.com › browse › penumbraPENUMBRA Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › penumbra

   • Cached

   Penumbra definition: the partial or imperfect shadow outside the complete shadow of an opaque body, as a planet, where the light from the source of illumination is only partly cut off..

7. dictionary.cambridge.org › english › penumbraPENUMBRA | definition in the Cambridge English Dictionary

   dictionary.cambridge.org › english › penumbra

   • Cached

   PENUMBRA meaning: 1. a part of a shadow in which only some of the light is blocked, used especially about a shadow…. Learn more.

8. www.vocabulary.com › dictionary › penumbraPenumbra - Definition, Meaning & Synonyms | Vocabulary.com

   www.vocabulary.com › dictionary › penumbra

   penumbra: 1 n a fringe region of partial shadow around an umbra Type of: shadow shade within clear boundaries

9. www.collinsdictionary.com › english › penumbraPENUMBRA definition and meaning | Collins English Dictionary

   www.collinsdictionary.com › english › penumbra

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   3 meanings: 1. a fringe region of half shadow resulting from the partial obstruction of light by an opaque object 2. astronomy.... Click for more definitions.

10. www.oxfordlearnersdictionaries.com › penumbrapenumbra noun - Definition, pictures, pronunciation and usage ...

    www.oxfordlearnersdictionaries.com › penumbra

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    Definition of penumbra noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.