bu·​to·​py·​ro·​nox·​yl ˌbyüt-ə-ˌpī-rə-ˈnäk-səl How to pronounce butopyronoxyl (audio)
: a yellow to reddish brown liquid C12H18O4 used as an insect repellent see indalone

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“Butopyronoxyl.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/butopyronoxyl. Accessed 15 Jul. 2024.

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