Hau·sen n.  Zool. A large sturgeon (Acipenser huso syn. Huso huso) from the region of the Black Sea; also called Beluga.  It is sometimes twelve feet long, and provides the highest quality caviar.

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 Hu·so n.  Zool. (a) A large European sturgeon (Huso huso or Acipenser huso), inhabiting the region of the Black and Caspian Seas. It sometimes attains a length of more than twelve feet, and a weight of two thousand pounds. Called also hausen and beluga.  It is the source of the finest and most esteemed caviar. (b) The huchen, a large salmon.

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 I·sin·glass n.
 1. A semitransparent, whitish, and very pure form of gelatin, chiefly prepared from the sounds or air bladders of various species of sturgeons (as the Acipenser huso) found in the rivers of Western Russia. It used for making jellies, as a clarifier, etc. Cheaper forms of gelatin are not unfrequently so called. Called also fish glue.
 2. Min. A popular name for mica, especially when in thin sheets.

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 Acipenser huso
      n : valuable source of caviar and isinglass; found in Black and
          Caspian seas [syn: beluga, hausen, white sturgeon]