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List of TERMS
Annual ring: The growth layer produced by the tree in a single growth year, including earlywood and latewood.
Annual ring
Burr: A few trees respond to a marked increase in light levels by producing from the trunk a mass of twigs known as epicormic shoots. Left on the tree, these will eventually be engulf by enlarging trunk to produce a feature called a burr. When cut through, this burr produces a beautiful figure comprising the distorted growth rings of the large number of small knots.
Burr
Equilibrium moisture content: A moisture content at which wood neither gains nor loses moisture to the surrounding air.
Equilibrium moisture content
Fiber saturation point: The moisture content at which the cell walls are saturated with water (bound water) and no water is held in the cell cavities by capillary forces (free water).
Fiber saturation point
Hardwoods: One of the botanical groups of trees that have vessels (pores) and have broad leaves. The term has no reference to the actual hardness of the wood.
Hardwoods
Heartwood: The inners layers of wood, extending from the pith to the sapwood, which in the growing tree have ceased to contain living cells and in which the reserve materials have been converted into heartwood substances. Heartwood may be infiltrated with gums, resins and other materials which usually make it darker and more decay-resistant than sapwood.
Heartwood
Sapwood: The portion of the wood that in the living tree contains living cells and reserve materials. The layers of wood next to the bark, usually lighter in color than the heartwood and actively involved in the life processes of the tree. Under most conditions sapwood is more susceptible to decay than heartwood. It is also more permeable to liquids. Sapwood is not essentially weaker or stronger than heartwood of the same species.
Sapwood
Softwoods: One of the botanical groups of trees that have no vessels (pores) and have needlelike (in most cases) or scalelike leaves, the conifers. The term has no reference to the actual hardness of the wood
Softwoods
Wood: Aggregate of secondary tissues (conductive, mechanical and storing) found in stems, branches and roots of woody plants between the bark and the pith
Wood