long-range intramolecular interaction

in polymers
An interaction between segments, widely separated in sequence along the chain, that occasionally approach one another during molecular flexing. This type of interaction is closely related to the excluded volume of a segment, the latter quantity reflecting interactions involving segments and solvent molecules. If no confusion can occur, the word 'intramolecular' may be omitted.
Purple Book, 1st ed., p. 48 (http://old.iupac.org/publications/books/author/metanomski.html)