a chemical bond between different chains of atoms in a polymer or other complex molecule.
(cross-link) make or become linked with a cross link: [with object]:adjacent protein chains are cross-linked by quinones [no object]:these substances cross-link without any problem (as adjective cross-linked)cross-linked copolymers of vinyl pyrrolidone with methyl methacrylate
[with object] connect (something) by a series of transverse links:cross-link the guidance system with the actual games programme
cross link in other Oxford dictionaries
Definition of cross link in the US English dictionary