adjective
(zoology) Having chelae, or in the form of a chela.[from 19th c.]
(chemistry) Relating to chelation. [from 20th c.]
noun
(chemistry) A chelate compound.
verb
(transitive, chemistry) to form a chelate compound by combining a metal atom to form a ring.
(transitive, medicine) to remove heavy metals from the bloodstream using a chelate (such as EDTA).