noun Botany.

  1. the softer part of the wood between the inner bark and the heartwood.


  1. the soft wood, just beneath the bark in tree trunks, that consists of living tissueCompare heartwood

  1. The younger layers of new wood produced by the interior side of the vascular cambium within a tree trunk. Sapwood is active in the conduction of water and is usually lighter in color than heartwood.

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