CHELATE

I. adjective Date: 1826 resembling or having chelae, of, relating to, or being a ~, II. verb (~d; chelating) Date: 1922 transitive verb to combine with (a metal) so as to form a ~ ring, intransitive verb to react so as to form a ~ ring, chelatable adjective III. noun Date: 1943 a compound having a ring structure that usually contains a metal ion held by coordinate bonds