walnut borer

noun

Definition of walnut borer

1 : a blue-winged longicorn beetle (Gaurotes cyanipennis) whose larva bores into the wood of the black walnut
2 : any of several ambrosia beetles (especially Anisandrus pyri or A. dispar) that bore under the bark or in the wood of the black walnut

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“Walnut borer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/walnut%20borer. Accessed 21 Sep. 2020.

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