infiltration

The act or process of infiltrating.

The state of being infiltrated.

Something that infiltrates.

In geology, the introduction of water into porous or open-textured rock. The term is specially employed in the discussion of ore-deposits to describe the introduction of new minerals in solution.

In pathology, a morbid condition of any portion of tissue produced by the accumulation in it of substances introduced from without: distinguished from degeneration, where the substance abnormally present is produced from the tissue itself through faulty metabolism.