Source : Webster's Revised Unabridged Dictionary (1913)

Infiltration \In`fil*tra"tion\, n. [Cf. F. infiltration.]
   1. The act or process of infiltrating, as if water into a
      porous substance, or of a fluid into the cells of an organ
      or part of the body.

   2. The substance which has entered the pores or cavities of a
      body. --Addison.

            Calcareous infiltrations filling the cavities.
                                                  --Kirwan.

   {Fatty infiltration}. (Med.) See under {Fatty}.

   {Infiltration gallery}, a filter gallery.