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addaword.gifdefinition of umbra

noun
the central cone of darkness in the shadow thrown on the surface of the moon during an eclipse
The Moon stands over the southern Indian Ocean as it passes through the central dark umbra of the Earth's shadow, plunging deeper into the shadow than during any eclipse since 2000.
Submitted by: Mortimer from United Kingdom on 30/06/2011 08:15:00
Definition of umbra from the Open Dictionary – a public resource hosted by Macmillan English Dictionary Online

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