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.

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

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.

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.
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

penumbra

noun
Comparative darkness that results from the blocking of light rays:
Translations

penumbra

[pɪˈnʌmbrə] N (penumbras or penumbrae (pl)) [pɪˈnʌmbriː]penumbra f

penumbra

n pl <-s or -e> → Halbschatten m
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.
The penumbra harbours an outward flow of gas along the horizontal threads.
The penumbra harbors an outward flow of gas along the horizontal threads.
The total phase of this lunar eclipse, also known as a Blood Moon, would visible penumbra l at 15-51 PST, an official of Met office told reporter.
Este ano arranca con impetu La sirena hechicera del rock, no solo porque el 22 de febrero festejara 30 anos de trayectoria en el Teatro de la Ciudad con Mayita Campos y Margarita Bauche, la rapera Jezzy--Pe y Raquel Guerrero, guitarrista de Los Abominables, sino porque le da un giro de 180 grados a su relacion con la literatura: el sabado 13 presenta junto a ellas su primera novela, Un blues en la penumbra.
Because the Sun isn't a point source, the cone-shaped shadow cast by the Earth has two components: the penumbra and umbra.
Those who happen to be in the umbra region experience a total eclipse while those who are in the penumbra region see a partial eclipse.
related items, and ancillary items manufactured/distributed by penumbra from consortia contract(s); ppca266, ppca298, ppca310 premier, and ms1431, ms1449 vizient.
Healthcare company Penumbra Inc (NYSE:PEN) disclosed on Wednesday that it has promoted Daniel Davis to the position of chief commercial officer.
Penumbra Inc (NYSE: PEN), a global healthcare company focused on interventional therapies, announced on Friday that it has named Bridget O'Rourke as its new director effective immediately, serving as a member of the Audit, Compensation and Nominating and Corporate Governance Committees.
org that facilitates access to African American history through digitization content, community events and workshops developed by the Givens Collection of African American Literature at the University of Minnesota Libraries' Archives and Special Collections, with Penumbra Theatre Company.