sapwood Meaning, Definition & Usage
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noun newly formed outer wood lying between the cambium and the heartwood of a tree or woody plant; usually light colored; active in water conduction
WordNet
Sap"wood` noun
Definitions
(Bot.) The alburnum, or part of the wood on any exogenous tree next to the bark, being that portion of the tree through which the sap flows most freely; -- distinguished from Heartwood.