macromolecule noun. [makrǝ(ʊ)'mɒlɪkju:l] L19.
[from MACRO- + MOLECULE.]
Chemistry.
1. A group of molecules in a crystal bound together in a characteristic shape, supposed to account for the symmetry of the crystal. Only in L19.

2. A molecule composed of a very large number of atoms and having a high molecular weight (e.g. a molecule of a polymer, protein, or nucleic acid). E20.

■ macromo'lecular adjective of, pertaining to, or consisting of a macromolecule or macromolecules M20.

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