Zero Lot Line Development. Zero lot line development allows single-family residences, sharing a common street frontage, to shift to one side of a lot. This means that the same side of each lot may have a zero or reduced setback.

Zero-Rise Floodway. The channel of the stream and that portion of the adjoining floodplain which is necessary to contain and discharge the base flood flow without increasing the base flood elevation. The zero-rise floodway will always include the FEMA floodway.

Zoos, Botanical Gardens, Arboreta, Etc. An establishment that preserves and exhibits live plant and animal live displays, including those in natural areas or settings (as in the case of national parks).