Noah Webster Dictionary (1913 edition): Umbra

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Noah Webster Dictionary (1913 edition): Umbra


Subjects in this Topic:

(1):

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

(2):

(n.) The central dark portion, or nucleus, of a sun spot.

(3):

(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.

(4):

(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.