summerwood

/ˈsʌmərˌwʊd/
noun
  1. The dense, darker part of an annual growth ring in a tree, formed later in the growing season.
    • When you look at a cross-section of a tree trunk, the summerwood appears as a narrow, dark band.
    • The summerwood in this oak plank is much darker than the springwood.
    • The strength of the lumber comes largely from the dense summerwood layers.
Synonyms
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