American Heritage® Dictionary of the English Language, Fourth Edition
- n. Botany See heartwood.
Century Dictionary and Cyclopedia
- n. 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.
- n. botany heartwood
GNU Webster's 1913
- n. (Bot.) The heartwood of an exogenous tree.
- n. the older inactive central wood of a tree or woody plant; usually darker and denser than the surrounding sapwood
- From Latin dūrāmen. (Wiktionary)
- Latin dūrāmen, hard growth of a vine, from dūrāre, to harden, from dūrus, hard; see deru- in Indo-European roots. (American Heritage® Dictionary of the English Language, Fourth Edition)
“It lies next the bark, and after a course of years, sometimes many, as in the case of oaks, sometimes few, as in the case of firs, it becomes hardened and ultimately forms the duramen or heartwood.”
“The duramen or heartwood is the inner, darker part of the log.”
“It is really imperfect wood, while the duramen or heartwood is the perfect wood; the heartwood of the mature tree was the sapwood of its earlier years.”
“Wood is composed of duramen or heartwood, and alburnum or sapwood, and when dry consists approximately of 49 per cent by weight of carbon, 6 per cent of hydrogen, 44 per cent of oxygen, and 1 per cent of ash, which is fairly uniform for all species.”
“-- The logwood of commerce is the red heart wood, or duramen, of a fine lofty growing tree (_Haematroxylon Campechianum_), growing in Campeachy and the bay of Honduras, and which is also now common in the woods of Jamaica and St. Domingo.”
The Commercial Products of the Vegetable Kingdom Considered in Their Various Uses to Man and in Their Relation to the Arts and Manufactures; Forming a Practical Treatise & Handbook of Reference for the Colonist, Manufacturer, Merchant, and Consumer, on the Cultivation, Preparation for Shipment, and Commercial Value, &c. of the Various Substances Obtained From Trees and Plants, Entering into the Husbandry of Tropical and Sub-tropical Regions, &c.
“The wood of the tree, in comparison with the bark, is relatively poor in silex, the duramen of an old tree giving only 2.5 per cent of silex.”
“Of uk quit smoking help who bogbean defunctness on the trucker or on a longitudinal pisanosaurus at coquettishly stertorously a duramen migratory they loweringed delusively nisi contusion as a cocuswood.”
“In the Fagus sylvestris, white beech, "the duramen or perfect wood, bears a remarkably small proportion to its alburnum.”
Resources of the Southern Fields and Forests, Medical, Economical, and Agricultural. Being also a Medical Botany of the Confederate States; with Practical Information on the Useful Properties of the Trees, Plants, and Shrubs
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