August 14-20, 2006

Penumbra

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

Back to WOW archives