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.-the central dark portion, or nucleus, of a sun spot.-the fainter part of a sun spot; -- now more commonly called penumbra.-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.