Meaning

noun (medicine) the process of removing a heavy metal from the bloodstream by means of a chelate as in treating lead or mercury poisoning

noun the process of forming a ring by forming one or more hydrogen bonds

originEtymology tree English chelate Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Latin -ātiōlbor. Old French -ationbor. Middle English -acioun English -ation English -ion English chelation From chelate + -ion.

Etymology from Wiktionary, CC BY-SA 3.0