We found one dictionary that defines the word polywheel:

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1. polywheel: Wiktionary

Definitions from Wiktionary (polywheel) ▸ noun:  Synonym of omni wheel ▸ Words similar to polywheel ▸ Usage examples for polywheel ▸ Idioms related to polywheel ▸ Wikipedia articles (New!) ▸ Popular adjectives describing polywheel ▸ Words that often appear near polywheel ▸ Rhymes of polywheel ▸ Invented words related to polywheel