blue stain

noun

variants or less commonly blue sap stain
: a bluish discoloration of sapwood caused in many trees and especially conifers by any of various fungi (as of the genera Ceratostomella, Penicillium, or Fusarium) compare blue rot

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Cite this Entry

“Blue stain.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blue%20stain. Accessed 28 Nov. 2024.

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