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.

Source: Webster's Revised Unabridged Dictionary (1913)