Found 2 items, similar to heartwood.
English → English (WordNet) Definition: heartwood heartwood n : the older inactive central wood of a tree or woody plant; usually darker and denser than the surrounding sapwood [syn: duramen]
English → English (gcide) Definition: Heartwood Heartwood \Heart"wood`\ (h[aum]rt"w[oo^]d`), n. The hard, central part of the trunk of a tree, consisting of the old and matured wood, and usually differing in color from the outer layers. It is technically known as duramen, and distinguished from the softer sapwood or alburnum. [1913 Webster]