Source : Webster's Revised Unabridged Dictionary (1913)

Cooling \Cool"ing\, p.a.
   Adapted to cool and refresh; allaying heat. ``The cooling
   brook.'' --Goldsmith.

   {Cooling card}, something that dashes hopes. [Obs.]

   {Cooling time} (Law), such a lapse of time as ought, taking
      all the circumstances of the case in view, to produce a
      subsiding of passion previously provoked. --Wharton.