The act of decanting the supernatant liquid from a solid sediment(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "decantation" in a sentence
"-- The purification of conjugial love may be compared with the purification of natural spirits, as effected by the chemists, and called decantation, 145."
"This social decantation is now complete as in front of Chavez the large majority of people who are self reliant and who think that individual choices and responsibilities hold still some meaning in Venezuela are in absolute opposition to Chavez."
"It has become much more supple and delicious and can be drunk after several hours of decantation with great pleasure."