mac·ro·mol·e·cule 
(măk′rō-mŏlĭ-kyl′)
(măk′rō-mŏlĭ-kyl′)n.
A very large molecule, such as a polymer or protein, consisting of many smaller structural units linked together. Also called supermolecule.
mac′ro·mo·lecu·lar (-mə-lĕkyə-lər) adj.