Chemistry. the process of chelating.
a method of removing certain heavy metals from the bloodstream, used especially in treating lead or mercury poisoning.
a controversial treatment for arteriosclerosis that attempts to remove calcium deposits from the inner walls of the coronary arteries.

1930–35; chelate + -ion Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
chelation (ˈkiːleɪʃən)
1.  chem the process by which a chelate is formed
2.  animal husbandry the process by which trace elements in an animal's feed are bonded to amino acids, ensuring their absorption into the animal's body
3.  geology the chemical removal of metallic ions in a mineral or rock by weathering

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
chelation   (kĭ-lā'shən)  Pronunciation Key 
The combination of a metal ion with a chemical compound to form a ring. Chelation is used in the industrial separation and extraction of metals and to treat metal poisoning.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Iron chelation therapy is used to remove the excess iron caused by blood transfusions.
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