| Penumbra |
An incomplete or partial shadow. |
n. |
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| Penumbra |
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. |
n. |
| Penumbra |
The part of a picture where the shade imperceptibly blends with the light. |
n. |
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