piper·o·nyl
| \ pīˈperənᵊl, pə̇ˈp-; ˈpipərəˌnil \
plural -s
Definition of piperonyl
: the univalent radical (CH2O2)C6H3CH2 of piperonyl alcohol; 3,4-methylenedioxy-benzyl
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Merriam-Webster unabridged
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