Terms related to required plant materials shall have the following meanings:
(a) Berm. An earthen mound designed to provide visual interest, screen undesirable views, and/or decrease noise.
(b) Caliper. American Association of Nurseryman standard for trunk measurement of nursery stock. Caliper of the trunk shall be taken six (6) inches above the ground up to and including four-inch caliper size, and twelve (12) inches above the ground for a caliper size greater than four (4) inches.
(c) Shade Tree. A tree with foliage that usually sheds annually and planted primarily for its high crown of foliage or overhead canopy.
(d) Shrub. A woody plant, smaller than a tree, consisting of several small stems from the ground or small branches near the ground.