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blue rot

noun
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Definition of blue rot

: a disease of conifers caused by certain fungi (genus Ceratostomella) and producing a blue coloration of the wood

— called also bluing

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“Blue rot.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blue%20rot. Accessed 7 Aug. 2020.

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