blue stain

noun
variants: or less commonly blue sap stain

Definition of blue 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 18 Jan. 2022.

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