duramen

Definitions

  • WordNet 3.6
    • n duramen the older inactive central wood of a tree or woody plant; usually darker and denser than the surrounding sapwood
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Webster's Revised Unabridged Dictionary
    • n Duramen (Bot) The heartwood of an exogenous tree.
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Century Dictionary and Cyclopedia
    • n duramen In botany, the central wood or heart-wood in the trunk of an exogenous tree. It is harder and more solid than the newer wood that surrounds it, from the formation of secondary layers of cellulose in the wood-cells. It is also usually of a deeper color, owing to the presence of peculiar coloring matters. Called by ship-carpenters the spine. See alburnum. Also dura.
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Chambers's Twentieth Century Dictionary
    • n Duramen dū-rā′mėn the inner and fully ripened wood of dicotyledonous trees.
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Etymology

Webster's Revised Unabridged Dictionary
L., hardness, a hardened, i. e., ligneous, vine branch, fr. durare, to harden. See Dure
Chambers's Twentieth Century Dictionary
L.,—durus, hard.

Usage

In literature:

The duramen or heartwood is the inner, darker part of the log.
"Seasoning of Wood" by Joseph B. Wagner
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