Look up: penumbra

1. penumbra
   The outer filamentary region of a sunspot.
   Found on http://www.solarviews.com/eng/terms.htm
   
   
2. Penumbra
   The SUNSPOT area that may surround the darker UMBRA or umbrae. It consists of linear bright and dark elements radial from the sunspot umbra.
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
3. penumbra
   [n] - a fringe region of partial shadow around an umbra
   Found on http://www.webdictionary.co.uk/definitio
   
   
4. Penumbra
   (1). The lighter part of a sunspot. (2). The area of partial shadow either side of the main umbra cone of shadow cast by the Earth.
   Found on http://www.delscope.demon.co.uk/astronom
   
   
5. Penumbra
   Means, literally, 'dim light'. It most often refers to the outer shadow cast during eclipses, and defines the region of shadow which gives rise to a partial eclipse. The lighter area surrounding the central region of a sunspot.
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
6. Penumbra
   The transition region between the darkest shadow and full brightness. Only part of the light from the source reaches this region.
   Found on http://www.diracdelta.co.uk/science/sour
   
   
7. penumbra
   the region of gradually diminishing darkness surrounding the region of complete darkness in the shadow cast by an opaque object in the presence of an extensive light source Category: Physics
   Found on http://www.mijnwoordenboek.nl/definition
   
   
8. Penumbra
   Pe·num'bra noun [ New Latin , from Latin paene almost + umbra shade.] 1. An incomplete or partial shadow. 2. (Astron.) The shadow cast, in an eclipse, where the light is partly, but not wholly, cut off by the interv...
   Found on http://www.encyclo.co.uk/webster/P/50
   
   
9. penumbra
   1. An incomplete or partial shadow. ... 2. <astronomy> The shadow cast, in an eclipse, where the light is partly, but not wholly, cut off by the intervening body; the space of partial illumination between the umbra, or perfect shadow, on all sides, and the full light. ... The faint shade surro...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
10. penumbra
    noun a fringe region of partial shadow around an umbra
    Found on http://wordnetweb.princeton.edu/perl/web
    
    
11. penumbra
    (pә-num´brә) the part of a shadow in which there is a small amount of illumination from a light source. blurring at the edges of a structure on a radiograph.
    Found on http://www.encyclo.co.uk/local/21001
    
    
12. Penumbra
    • (n.) The part of a picture where the shade imperceptibly blends with the light. • (n.) The shadow cast, in an eclipse, where the light is partly, but not wholly, cut off by the intervening body; the space of partial illumination between the umbra, or perfect shadow, on all sides, and the...
    Found on http://thinkexist.com/dictionary/meaning
    
    
13. penumbra
    (from the article `Sun`)
    Found on http://www.britannica.com/eb/a-z/p/40
    
    
14. penumbra
    (from Latin paene, `almost`; umbra, `shadow`), in astronomy, the outer part of a conical shadow, cast by a celestial body, where the light from the ... [1 related articles]
    Found on http://www.britannica.com/eb/a-z/p/40
    
    
15. penumbra
    penumbra (s), penumbrae (pl), penumbral 1. In astronomy, a partial outer shadow that is lighter than the darker inner shadow (umbra); that is, the area between complete darkness and complete light in an eclipse. 2. In astronomy, a grayish area surrounding the dark center of a sunspot. 3. An indistinct area, especially a state in which some...
    Found on http://www.wordinfo.info/words/index/inf
    
    
16. penumbra
    penumbra (pinŭm'bru) : see eclipse; sunspots.
    Found on http://www.infoplease.com/ce6/sci/A09173
    
    
17. Penumbra
    A penumbra is a partly shaded region around the shadow of an opaque body. The term is especially applied to describe the partly shaded region around a total eclipse of the sun or moon.
    Found on http://www.probertencyclopaedia.com/brow
    
    
18. penumbra
    Type: Term Pronunciation: pe-nŭm′bră Definitions: 1. The region of partial illumination or radiation caused by light or x-rays not originating from a point source; also called geometric unsharpness.
    Found on http://www.medilexicon.com/medicaldictio
    
    
19. penumbra
    Region of partial shade between the totally dark part (umbra) of a shadow and the fully illuminated region outside. It occurs when a source of light is only partially obscured by a shadow-casting object. The darkness of a penumbra varies gradually from total darkness at one edge to full brightness at the other. In astronomy, a penumbra is a reg...
    Found on http://www.talktalk.co.uk/reference/ency
    
    
20. penumbra
    the larger shadow cast by the Moon during a solar eclipse.
    Found on http://www.kidseclipse.com/pages/glossar
    
    
21. Penumbra
    The name given to the shadow cast by a celestial object that only blocks a portion of the light.
    Found on http://www.moonconnection.com/moon-gloss
    
    
22. Penumbra
    (band) `Penumbra` is a French gothic metal band. They have released their last two albums through Season of Mist. http://www.metal-archives.com/band.php?id=5110 Biography : Formation of Penumbra : The original founders of Penumbra were Jarlaath and Dorian, who met at a concert in 1996. They f...
    Found on http://en.wikipedia.org/wiki/Penumbra