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umbra |
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umbra [um´brah]
the part of a shadow in which there is no light from any light source. a sharp appearance to the edges of a structure on a radiograph.
penumbra 1. Region of very low illumination on a dark background. 2. Zone in which the brightness varies from some illumination to zero (umbra) in the shadow cast by an opaque object intercepting light from an extensive light source. See shadow. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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This Umbra Rolly round occasional table by Matt Carr is made from American black walnut solid and veneers with a concealed tambour door for storage. The umbra then flits across the islands of southern Japan and veers into the western Pacific, where at one point the duration of totality -- when the solar disc is wholly covered -- will be six minutes, 39 seconds. The umbra then flits across the islands of southern Japan and veers into the western Pacific, where at one point the duration of totality -- when the solar disc is wholly covered -- will be six minutes, 39 seconds. |
umbra |
Umbles UMBN umbo umbo umbo umbo membrana tympanae umbo membrana tympanae umbo membrana tympanae Umbo of tympanic membrane Umbo of tympanic membrane Umbo of tympanic membrane umbonal umbonal umbonal umbonate umbonate umbonate umbones umbones umbones umbonic umbonic umbonic umbos umbos umbos Umbozero Umbozero Lake UMBP UMBR umbra Umbra and PenumbraUmbra and Penumbra Umbra and Penumbra Umbra of the Earth's Shadow Umbra tree Umbraculiferous Umbraculiform umbrae umbrae umbrae umbrage umbrage umbrage umbrage umbrageous umbrageous umbrageous umbrageously umbral umbral umbral Umbral Missions Blocking Radiating Astronomical Sources Umbral Plains umbras umbras umbras umbras Umbrate Umbratic Umbratile | ||||||||
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