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.sel.noaa.gov/info/glossary.ht
   
   
3. 
   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.encyclo.co.uk/nol.php
   
   
4. 
   penumbra
   [n] - a fringe region of partial shadow around an umbra
   Found on http://www.webdictionary.co.uk/definitio
   
   
5. 
   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
   
   
6. 
   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.exeterastro.co.uk/glossary.ht
   
   
7. 
   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
   
   
8. 
   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
   
   
9. 
   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 intervening body; the space of partial illumination between the umbra, or perfect shadow, on all sides, and the full light. Sir I. Newton. » T ...
   Found on http://www.encyclo.co.uk/webster/P/50
   
   
10. 
    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 surrounding the dark central portion of a solar spot is a ...
    Found on http://www.mondofacto.com/facts/dictiona
    
    
11. 
    penumbra
    noun a fringe region of partial shadow around an umbra
    Found on http://wordnet.princeton.edu/perl/webwn?
    
    
12. 
    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.mercksource.com/pp/us/cns/cns
    
    
13. 
    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 full light. • (n.) An incomplete or partial ...
    Found on http://thinkexist.com/dictionary/meaning
    
    
14. 
    penumbra
    (from the article `Sun`)
    Found on http://www.britannica.com/eb/a-z/p/40
    
    
15. 
    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
    
    
16. 
    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
    
    
17. 
    penumbra
    • The lighter, outer shadow of a double-shadow effect produced by a large, unfocused source of light shining on an interfering opaque object. A penumbral eclipse is one in which the eclipsed object passes through the penumbral shadow. • The lighter area, marked by radial filaments, that ...
    Found on http://www.daviddarling.info/encyclopedi
    
    
18. 
    penumbra
    penumbra (pinŭm'bru) : see eclipse; sunspots.
    Found on http://www.infoplease.com/ce6/sci/A09173