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mul·ti·mo·lec·u·lar | \ ˌməl-tē-mə-ˈle-kyə-lər 
, -ˌtī- \
, -ˌtī- \Definition of multimolecular
: relating to or composed of more than one molecule and especially more than one type of molecule
multimolecular complexes
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The first known use of multimolecular was in 1907
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