Umbra

5 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Ombre \Om"bre\, n. [F., of uncertain origin.] (Zool.)
     A large Mediterranean food fish ({Umbrina cirrhosa}): --
     called also {umbra}, and {umbrine}.
     [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 [gcide]:



  Penumbra \Pe*num"bra\, n. [NL., fr. L. paene almost + umbra
     shade.]
     1. An incomplete or partial shadow.
        [1913 Webster]
  
     2. (Astron.) The shadow cast, in an eclipse, where the light
        is partly, but not wholly, cut off by the intervening
        body; the space of partial illumination between the umbra,
        or perfect shadow, on all sides, and the full light. --Sir
        I. Newton.
        [1913 Webster]
  
     Note: The faint shade surrounding the dark central portion of
           a solar spot is also called the {penumbra}, and
           sometimes {umbra}.
           [1913 Webster]
  
     3. (Paint.) The part of a picture where the shade
        imperceptibly blends with the light.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Umbra \Um"bra\, n.; pl. {Umbrae}. [L., a shadow.]
     1. (Astron.)
        (a) 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}.
        (b) The central dark portion, or nucleus, of a sun spot.
        (c) The fainter part of a sun spot; -- now more commonly
            called penumbra.
            [1913 Webster]
  
     2. (Zool.) Any one of several species of sciaenoid food
        fishes of the genus {Umbrina}, especially the
        Mediterranean species ({Umbrina cirrhosa}), which is
        highly esteemed as a market fish; -- called also {ombre},
        and {umbrine}.
        [1913 Webster]
  
     {Umbra tree} (Bot.), a tree ({Phytolacca dioica}) of the same
        genus as pokeweed. It is native of South America, but is
        now grown in southern Europe. It has large dark leaves,
        and a somber aspect. The juice of its berries is used for
        coloring wine. --J. Smith (Dict. Econ. Plants).
        [1913 Webster]

From WordNet (r) 2.0 [wn]:

  umbra
       n : a region of complete shadow resulting from total obstruction
           of light
       [also: {umbrae} (pl)]

From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:

  21 Moby Thesaurus words for "umbra":
     adumbration, dark shade, eidolon, ghost, gloom, haunt, mere shadow,
     penumbra, phantasm, phantom, revenant, shade, shadiness, shadow,
     shadows numberless, silhouette, skiagram, skiagraph, spook,
     umbrage, umbrageousness