How do you spell Penumbra
Available Definitions:
1) n. - An incomplete or partial shadow.
2) n. - The shadow cast, in an eclipse, where the light is partly, but not wholly, cut off by the intervening body; the space of partial illumination between the umbra, or perfect shadow, on all sides, and the full light.
3) n. - The part of a picture where the shade imperceptibly blends with the light.
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