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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 heart·wood /-ˌwʊd/
 赤木質,心材

From: Webster's Revised Unabridged Dictionary (1913)

 Heart·wood 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.
 

From: WordNet (r) 2.0

 heartwood
      n : the older inactive central wood of a tree or woody plant;
          usually darker and denser than the surrounding sapwood
          [syn: duramen]