The Collaborative International Dictionary of English v.0.48:

Douceur \Dou`ceur"\, n. [F., fr. doux sweet. See Douce.]
   1. Gentleness and sweetness of manner; agreeableness.
      --Chesterfield.
      [1913 Webster]

   2. A gift for service done or to be done; an honorarium; a
      present; sometimes, a bribe. --Burke.
      [1913 Webster]