Source : Webster's Revised Unabridged Dictionary (1913)

Cruet \Cru"et\, n. [Anglo-French cruet, a dim. from OF. crue,
   cruie; of German or Celtic origin, and akin to E. crock an
   earthen vessel.]
   1. A bottle or vessel; esp., a vial or small glass bottle for
      holding vinegar, oil, pepper, or the like, for the table;
      a caster. --Swift.

   2. (Eccl.) A vessel used to hold wine, oil, or water for the
      service of the altar.

   {Cruet stand}, a frame for holding cruets; a caster.