1) Building block 2) Unit 
(1) Descriptive of any process that involves a transfer (of atoms, groups, electrons, etc.) or interactions between two or more molecular entities. (2) Relating to a comparison between different molecular entities. See also intramolecular.
Between molecules.Intermolecular forces are those forces between molecules.
[adj] - existing or acting between molecules
adjective existing or acting between molecules; `intermolecular forces`; `intermolecular condensation`
existing or occurring between molecules.