[ pi-per-uh-nl, pahy-, pip-er-uh-nil ]
/ pɪˈpɛr ə nl, paɪ-, ˈpɪp ər ə nɪl /
a light-brown liquid, C19H30O5, used chiefly as a synergist in certain insecticides.
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Words nearby piperonyl butoxide
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020