The Collaborative International Dictionary of English v.0.48:

Congeal \Con*geal"\, v. t. [imp. & p. p. Congealed; p. pr. &
   vb. n. Congealing.] [F. congeler, L. congelare, -gelatumn;
   con- + gelare to freeze, gelu frost. See Gelid.]
   1. To change from a fluid to a solid state by cold; to
      freeze.

   Syn: jell, set.
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              A vapory deluge lies to snow congealed. --Thomson.
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   2. To affect as if by freezing; to check the flow of, or
      cause to run cold; to chill.
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            As if with horror to congeal his blood. --Stirling.
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