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umbra [umbrae]▼(the fully shaded inner area of a shadow)noun[UK: ˈʌm.brə] [US: ˈʌm.brə]
penumbra [penumbras]▼(partially shaded area around a shadow, especially an eclipse)noun[UK: pɪ.ˈnʌm.brə] [US: pə.ˈnəm.brə]
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