- zoneEach of the five regions of the earth's surface into which it was divided by climatic differences, namely the torrid zone (between the tropics), two temperate zones (between the tropics and the polar circles), and two frigid zones (within the polar circles).
- shinglesHerpes zoster, caused by Human herpes virus 3, in genus Varicellovirus.
- perizoniumA thin membrane surrounding the auxospore of a diatom.
- zonureAny one of several of South African lizards of the genus Zonurus (now Smaug), common in rocky environments.