plural of relegation zone

(geology) the layer of the Earth's crust, at the top of the asthenosphere, where most earthquakes originate

Those parts of the Earth's surface between the tropics and the polar regions

(geology) A region of the Earth where one tectonic plate dives beneath another into the interior of the Earth.

(astronomy) The region of the Universe in alignment with the galactic plane of the Milky Way where few galaxies were initially seen due to dust interfering with the view of ground-based telescopes.

(geology, often humorous, by analogy to erogenous zone) A region characterized by mountain-building.

plural of orogenous zone

plural of home zone

(UK) A street or group of streets designed primarily to meet the needs of pedestrians, cyclists, children and residents, and where motor traffic is limited.

plural of red zone