We found one dictionary that defines the word macrointeraction:

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1. macrointeraction: Wiktionary

Definitions from Wiktionary (macrointeraction) ▸ noun:  A large-scale interaction. ▸ Words similar to macrointeraction ▸ Usage examples for macrointeraction ▸ Idioms related to macrointeraction ▸ Wikipedia articles (New!) ▸ Popular adjectives describing macrointeraction ▸ Words that often appear near macrointeraction ▸ Rhymes of macrointeraction ▸ Invented words related to macrointeraction