Umbra

1. 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.
2. 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.
3. n. The central dark portion, or nucleus, of a sun spot.
4. n. The fainter part of a sun spot; — now more commonly called penumbra.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.