| NOUN | phenomenon | half-light | a greyish light (as at dawn or dusk or in dim interiors) |
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| Meaning | A greyish light (as at dawn or dusk or in dim interiors). | |
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| Broader | light, visible light, visible radiation | (physics) electromagnetic radiation that can produce a visual sensation |
| Catalan | penombra | |
| Spanish | penumbra | |