—adj. 1. Chem. a. of or noting a heterocyclic compound having a central metallic ion attached by covalent bonds to two or more nonmetallic atoms in the same molecule.
b. of or noting a compound having a cyclic structure resulting from the formation of one or more hydrogen bonds in the same molecule.
2. Zool.having a chela or chelae.
—n. Chem.a chelate compound.
—v.i.Chem. 1. (of a heterocyclic compound) to react to form a chelate.
2. (of a compound) to form a ring by forming one or more hydrogen bonds.
—v.t. Chem.to combine (an organic compound) with a metallic ion to form a chelate.