The Collaborative International Dictionary of English v.0.48:
macromolecular \mac`ro*mo*lec"u*lar\, n. Of, pertaining to, or consisting of macromolecules. [PJC]WordNet (r) 3.0 (2006):
macromolecular adj 1: relating to or consisting of or characterized by macromolecules; "macromolecular compounds"