Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
The older, nonliving central wood of a tree or shrub, usually darker and harder than the younger sapwood. Also called duramen.
(Botany) the central core of dark hard wood in tree trunks, consisting of non-functioning xylem tissue that has become blocked with resins, tannins, and oils. Compare sapwood
the dense, dark, nonfunctioning older wood at the core of a tree trunk; duramen.
Switch to new thesaurus
|Noun||1.||heartwood - the older inactive central wood of a tree or woody plant; usually darker and denser than the surrounding sapwood|
tree - a tall perennial woody plant having a main trunk and branches forming a distinct elevated crown; includes both gymnosperms and angiosperms
wood - the hard fibrous lignified substance under the bark of trees