Arborist Terms and Definitions:Tree Pruning Terms:
Crown: Refers to the part of the tree consisting of the limbs, branches, twigs and leaves.
Crown Cleaning: The removal of dead, dying, diseased, crowded, weakly attached and low vigor branches from the crown of the tree
Crown Thinning: The selective removal of branches to increase light penetration and air movement through the crown. Thinning opens the foliage of a tree, reduces weight on heavy limbs, and helps retain the tree’s natural shape.
Crown Raising: Removes the lower branches from a tree in order to provide clearance for buildings, vehicles, pedestrians, and vistas.
Crown Reduction: Reduces the size (height or spread) of the tree, often for clearance for utility lines.