The following words and phrases when used in this chapter shall, for the purpose of this chapter, have the meanings respectively ascribed to them in this section:
(1) Street tree shall mean any tree within the urban county government right-of-way or designated tree planting easement, excepting those trees regulated pursuant to article 18 of the Zoning Ordinance or the Downtown Street Tree Ordinance.
(2) Large tree shall mean any tree species which normally attains a height in excess of fifty (50) feet at maturity.
(3) Medium tree shall mean any tree species which normally attains a height between fifteen (15) feet and fifty (50) feet at maturity.
(4) Small tree shall mean any tree species which normally attains a height between ten (10) feet and fifteen (15) feet at maturity.
(5) Person shall mean any person, corporation, partnership, company, contracting firm or other entity, including those employed under a contract with the urban county government.
(6) Tree planting easement shall mean a planting area with a minimum width of ten (10) feet located immediately adjacent and parallel to the curb or edge of pavement or in a designated easement per an approved development plan.
(7) Hazardous tree shall mean any street tree that is dead, diseased, or insect infested such that it poses a health threat to neighboring trees or creates a threat to the public safety or to property.
(8) Root zone shall mean the circular area on the ground around the trunk of the tree extending to or just outside the dripline or the edge of the canopy that contains the majority of the tree's roots.