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nonagon [nonagons]▼◼◼◼noun[UK: nˌɒnˈaɡɒn] [US: nˌɑːnˈæɡɑːn]
enneagon [enneagons]▼noun[UK: enˈiːɡən] [US: enˈiːɡɑːn]
enneagonal▼adjective[UK: enˈiːɡənəl] [US: enˈiːɡənəl]
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