معنی کلمه :‌ percolation

Of or pertaining to, or characteristic of, Ossian, a legendary Erse or Celtic bard. The compositions might be fairly classed as Ossianic. G. Eliot.

The act or process of percolating, or filtering; filtration; straining. Specifically (Pharm.), the process of exhausting the virtues of a powdered drug by letting a liquid filter slowly through it.