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Umbra 1

Definition: The central dark portion, or nucleus, of a sun spot.

Umbra 2

Definition: The fainter part of a sun spot; now more commonly called penumbra.

Umbra 3

Definition: Any one of several species of sciaenoid food fishes of the genus Umbrina, especially the Mediterranean species (U. cirrhosa), which is highly esteemed as a market fish; called also ombre, and umbrine.

umbra 4

Definition: a region of complete shadow resulting from total obstruction of light

 

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