infiltration

Definition

The act or process of infiltrating, as of water into a porous substance, or of a fluid into the cells of an organ or part of the body.

Etymology

From Middle English infiltracioun, from Medieval Latin infiltrātiōnem, infiltrātiō. By surface analysis, infiltrat(e) + -ion.

Example Sentences

• "calcareous infiltrations filling the cavities"
• "No one should be under any illusions about the objective of the Communist Party leadership: it’s long-term, systematic infiltration of social organisations, media and government. By the time China’s infiltration of Australia is readily apparent, it will be too late."