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duramen n. 心材,赤木质,木心 心材,赤木质,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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