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duramen n. 心材,赤木質,木心 心材,赤木質,木心 duramen n 1: the older inactive central wood of a tree or woody plant; usually darker and denser than the surrounding sapwood [ synonym: { heartwood}, { duramen}] Duramen \ Du* ra" men\, n. [ L., hardness, a hardened, i. e., ligneous, vine branch, fr. durare to harden. See { Dure}.] ( Bot.) The heartwood of an exogenous tree. [ 1913 Webster]
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]
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