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

umber \um"ber\, n. f. ombre ocherous ore of iron, terre
   d'ombre, it. terra d'ombra, literally, earth of shadow or
   shade, l. umbra shadow, shade. cf. umber, 3  4,
   umbrage.
   1. paint. a brown or reddish pigment used in both oil and
      water colors, obtained from certain natural clays
      variously colored by the oxides of iron and manganese. it
      is commonly heated or burned before being used, and is
      then called burnt umber; when not heated, it is called
      raw umber. see burnt umber, below.
      1913 webster

   2. an umbrere. obs.
      1913 webster

   3. f. ombre, umbre, l. umbra. zool. see grayling, 1.
      1913 webster

   4. cf. nl. scopus umbretta, f. ombrette; probably fr. l.
      umbra shade, in allusion to its dark brown color. see
      umber a pigment. zool. an african wading bird
      scopus umbretta allied to the storks and herons. it is
      dull dusky brown, and has a large occipital crest. called
      also umbrette, umbre, and umber bird.
      1913 webster

   burnt umber paint., a pigment made by burning raw umber,
      which is changed by this process from an olive brown to a
      bright reddish brown.

   cologne umber, or german umber, a brown pigment obtained
      from lignite. see cologne earth.
      1913 webster
see also:
umber umbrage burnt umber raw umber burnt umber grayling 
scopus umbretta umbrette umbre umber bird cologne umber 
german umber cologne earth 

[2] : WordNet (r) 2.0

burnt umber
     n 1: dark brown pigment obtained by heating umber
     2: a medium to dark brown color syn: chocolate, coffee, deep
        brown, umber
see also:
chocolate coffee deep brown umber 

Burnt Umber >> B Words
Burnt Umber, definition of term: Burnt Umber
burnt+umber_pag1.html

Burnt >> B Words
Burnt, definition of term: Burnt
burnt_pag1.html

Burnt Out >> B Words
Burnt Out, definition of term: Burnt Out
burnt+out_pag1.html