From one molecule to another; between molecules(adjective)
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Use "intermolecular" in a sentence
""intermolecular" (and how do you have "intermolecular forces" if you have a gas which isn't molecules, but I digress: -)."
"When the 28mer came up, a new intermolecular interface had to be formed to attach the alpha to the beta ring."
"This research has resulted in the development of accurate intermolecular potential models for polar fluids, such as ammonia, that include three body interactions."