| A | B |
|---|
| Forest land | land at least 10 percent stocked by forest trees |
| Timberland | forest land capable of producing 20 cubic feet of industrial wood per year |
| Forest | large group of trees and shrubs |
| Lumber | boards cut from trees |
| Board Foot | a unit of measurement for lumber that equals 1"x12"x12" |
| Trees | woody plants that produce a main trunk and have a more or less distinct and elevated head (a height of 15 ft or more) |
| Shrubs | woody perennial plants that normally grow low, produce many stems or shoots from the base, and do not reach more than 15 ft high |
| Forestry | industry that grows, manages, and harvests trees for lumber, poles, posts, panels, and many other commodities |
| Evergreen | plants that do not lose their leaves on a yearly basis |
| Conifers | evergreen trees with needlelike leaves and cones |
| Softwood | wood from conifers |
| Deciduous | plants that lose their leaves every year |
| Hardwood | wood from deciduous trees |
| Pulpwood | wood used for making fiber for paper and other products |
| Clear cut | removal of all marketable trees from an area |
| Plywood | construction material made from thin layers of wood glued together |
| Veneer | thin sheet of wood used for paneling and furniture |
| Cambium | growth layer in a tree root, trunk or limb |
| Annual rings | rings in a cross section of a tree root, trunk or limb representing one year's growth |
| Xylem layer | vessels of the vascular bundle that carry the water and nutrients from roots to leaves |
| Sapwood | transports water and minerals upward in tree roots, trunks and stems |
| Phloem | cells that carry manufactured food to to areas of the plant where it is stored or used |
| Inner bark | phloem; transports food downward in trees |
| Heartwood | inactive core of a trunk or limb |
| Hardness | wood's resistance to compression |
| Shrinkage | changes in dimensions of wood as it reacts to changes in humidity and temperature |
| Warp | the tendency of wood to bend permanently due to moisture change |
| Ease of working | refers to the difficulty in cutting, shaping, nailing, and finishing wood |
| Woodlot | small, privately owned forest |
| Silviculture | the ecientific management of forests |
| Arboriculture | care and management of trees for ornamental purposes |
| Seedlings | young plants grown from seed |
| Forester | a person who studies and manages forests |
| Virgin | a forest that has never been forested |
