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phantom |
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phantom [′fan·təm]
(geology) A bed or member that is absent from a specific stratigraphic section but is usually present in a characteristic position in a sequence of similar geologic age. (nucleonics) A volume of material approximating as closely as possible the density and effective atomic number of living tissue, used in biological experiments involving radiation. (petrology) 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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