cross-link 
(krôslĭngk, krŏs-)
(krôslĭngk, krŏs-)n.
A chemical bond formed between adjacent chains of a complex molecule such as a polymer.
v. cross-linked, cross-link·ing, cross-links
v.tr.
To join (adjacent chains of a complex molecule) with cross-links.
v.intr.
To form cross-links.