American Heritage® Dictionary of the English Language, Fourth Edition
- n. The older, nonliving central wood of a tree or woody plant, usually darker and harder than the younger sapwood. Also called duramen.
Century Dictionary and Cyclopedia
- n. The central wood in the trunk of an exogenous tree; duramen.
- n. The Tasmanian ironwood, Notelæa ligustrina, the hard, close-grained wood of which is used for turning.
GNU Webster's 1913
- 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 sapwoodor alburnum.
- n. the older inactive central wood of a tree or woody plant; usually darker and denser than the surrounding sapwood
“Fortunately, he accepted me as his Ph.D. student and I began to explore the neoflavonoids found in a piece of heartwood from a Brazilian tree.”
“Libby also checked his method by determining the age of heartwood from the trunks of redwood trees (Sequoia sempervirens), and of Douglas firs”
“Wood heavy, hard, strong, mostly light colored except in old heartwood, which is reddish.”
“The heartwood is a red or pinkish color, the sapwood, which is considerable, is a creamy white.”
“GIBSON: They're a nice, knot-free heartwood, meaning that there's no outer layer of sapwood on it.”
“The stairs were of the same beautiful distressed heartwood pine as the upstairs floors and fastened down with fancy bronze button nails.”
“For the left side of the ‘volume’ mature wood was selected and for the right side sapwood, while the fore-edge was made from heartwood; the top surface incorporated cross-sections from branches of various ages while the bottom surface showed a section through the trunk …”
“The heartwood tongue and groove pattern lends itself to the soft nature if the interior design.”
“When a young tree grows, it has a lot of moisture around the center of its trunk, or the 'heartwood.”
“However, if the tree does not harden itself on the outside, the moisture will freeze the inner heartwood, and the tree will die.”
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or impervious that clouds and is the tissue
Just what it says. Archery rocks.
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