Source : Webster's Revised Unabridged Dictionary (1913)

Isinglass \I"sin*glass\, n. [Prob. corrupted fr. D. huizenblas
   (akin to G. hausenblase), lit., bladder of the huso, or large
   sturgeon; huizen sturgeon + blas bladder. Cf. {Bladder},
   {Blast} a gust of wind.]
   1. A semitransparent, whitish, and very pure from of gelatin,
      chiefly prepared from the sounds or air bladders of
      various species of sturgeons (as the {Acipenser huso})
      found in the 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.

Hausen \Hau"sen\, n. [G.] (Zo["o]l.)
   A large sturgeon ({Acipenser huso}) from the region of the
   Black Sea. It is sometimes twelve feet long.

Huso \Hu"so\, n. [NL., fr. G. hausen, and E. isin?glass.]
   (Zo["o]l.)
   (a) A large European sturgeon ({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}.

Source : WordNet®

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