D defs.my
Entry 2 senses Webster, 1913

chelation

· IPA /kiːˈleɪʃən/
01 n. the process of removing a heavy metal from a solution by means of a chelate;
  1. 1.
    the process of removing a heavy metal from a solution by means of a chelate;(Med.)
  2. 2.
    the process of forming a ring by forming one or more hydrogen bonds.