penumbra


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penumbra

pe·num·bra

 (pĭ-nŭm′brə)
n. pl. pe·num·bras or pe·num·brae (-brē)
1. A partial shadow, as in an eclipse, between regions of complete shadow and complete illumination.
2. The diffuse outer part of a sunspot.
3. An area in which something exists to a lesser or uncertain degree: "The First Amendment has a penumbra where privacy is protected from governmental intrusion" (Joseph A. Califano, Jr.).
4. An outlying surrounding region; a periphery: "Downtown Chicago and its penumbra also stand rejuvenated" (John McCormick).

[New Latin pēnumbra : Latin paene, almost + Latin umbra, shadow.]

pe·num′bral, pe·num′brous adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

penumbra

(pɪˈnʌmbrə)
n, pl -brae (-briː) or -bras
1. (Astronomy) a fringe region of half shadow resulting from the partial obstruction of light by an opaque object
2. (Astronomy) astronomy the lighter and outer region of a sunspot
3. (Art Terms) painting the point or area in which light and shade blend
[C17: via New Latin from Latin paene almost + umbra shadow]
peˈnumbral, peˈnumbrous adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

pe•num•bra

(pɪˈnʌm brə)

n., pl. -brae (-brē), -bras.
1.
a. 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.
b. the grayish marginal portion of a sunspot.
2. a shadowy, indefinite, or marginal area.
[1660–70; < New Latin, = Latin paen(e) almost + umbra shade]
pe•num′bral, pe•num′brous, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

pe·num·bra

(pĭ-nŭm′brə)
1. A partial shadow between regions of complete shadow and complete illumination, especially as cast by Earth, or the moon, over another body during an eclipse.
2. The grayish outer part of a sunspot. Compare umbra.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.penumbra - a fringe region of partial shadow around an umbrapenumbra - a fringe region of partial shadow around an umbra
shadow - shade within clear boundaries
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

penumbra

noun
Comparative darkness that results from the blocking of light rays:
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Translations

penumbra

[pɪˈnʌmbrə] N (penumbras or penumbrae (pl)) [pɪˈnʌmbriː]penumbra f
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

penumbra

n pl <-s or -e> → Halbschatten m
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
References in classic literature ?
Slowly the penumbra, the shadow of a shadow, crept on over the bright surface, and as it crept I heard deep gasps of fear rising from the multitude around.
The penumbra, dense and dark, was the virtual screen of a figure which stood in it as still as some image erect in a niche or as some black-vizored sentinel guarding a treasure.
Healthcare company Penumbra Inc (NYSE:PEN) reported on Thursday the appointment of Sri Kosaraju as its president in addition to his current responsibilities as chief financial officer.
Shares of Penumbra (PEN) are down 5% in early trading after short-selling focused research firm Spruce Point issued a short report on the stock, outlining their thesis why the share price is at risk for 40%-55% downside risk.
This shadow has a central and outer shadow called umbra and penumbra, respectively.
in Taiwan, when the moon is in the earth's penumbra -- the part of a shadow where the light source, or the sun, is partially blocked.
Accompanied by walking guide Bill Dallas, who kept them all motivated, they were raising cash for Penumbra and managed to make PS2,100.
'The Global Tour producers have been encouraged to showcase local strengths and the Philippines - with a reputation for world-class entertainment talent - is kicking off with a shadow play by El Gamma Penumbra, grand champions from the Asia's Got Talent TV show,' ILO said.
Healthcare company Penumbra Inc (NYSE:PEN) revealed on Friday the addition of Janet Leeds and Surbhi Sarna to its board of directors to increase the board to eight directors, six of whom are independent.
The outer part of the cone-shaped shadow is called the penumbra. The penumbra is less dark than the inner part of the shadow because it is penetrated by some sunlight.
5 September 2018 - California, US-based healthcare company Penumbra, Inc.
The series' prequel, 'Penumbra,' also got rave reviews from book catalog website Goodreads.