August 14-20, 2006


noun - plural penumbrae or penumbras

1 a the partly shaded region around the shadow of an opaque body, esp. that around the total shadow of the moon or the earth in an eclipse. b the less dark outer part of a sunspot. 2 a partial shadow. penumbral adj. (modern Latin from Latin paene almost + umbra shadow)

Source: The Canadian Oxford Dictionary

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