Umbra n. : The conical shadow projected from a planet or satellite, on the side opposite to the sun, within which a spectator could see no portion of the sun's disk; -- used in contradistinction from penumbra. See Penumbra.

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

Umbra n. : The fainter part of a sun spot; -- now more commonly called penumbra.

Umbra n. : 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.

Example:
What occurs during a lunar eclipse when the Umbra does not hit earth?

Taxonomy
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Defination from the web:
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