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Wiktionary
ozone hole

n. A region of the stratosphere over Antarctica (and a smaller one over the Arctic) that is depleted of ozone in the local spring.

WordNet
ozone hole

n. an area of the ozone layer (near the poles) that is seasonally depleted of ozone

Usage examples of "ozone hole".

Thus part of the reason the topmost layers of Martian soil are antiseptic is that Mars has an ozone hole of planetary dimensions—.

Thus part of the reason the topmost layers of Martian soil are antiseptic is that Mars has an ozone hole of planetary dimensions-by itself a useful cautionary tale for us, who are busily thinning and puncturing our ozone layer.

Li Chengdu was an ascetically lean, sallow-faced man who had been born in Singapore of a Chinese merchant family, educated in Shanghai and Geneva, and was rumored to be in line for a Nobel Prize for his research in atmospheric physics: he had found a way to reverse the depletion of the ozone layer and close the long-dreaded ozone hole in the upper atmosphere.

Several stations monitor the Ozone Hole, which opens each spring like a gigantic gash in Antarctica's sky.

A professor of political science and public policy at Berkeley turned his students loose to research both the history and the scientific status of major environmental issues: DDT, Alar, Love Canal, asbestos, the ozone hole, global warming, acid rain.

It's one of five permanently occupied survey stations that measure the behavior and fluctuations of the Antarctic ozone hole.

You take a spray canister of refrigerant, R-12 if you can still get it, what with the ozone hole and everything, or R-134a, and you spray it into the lock cylinder until the works are frozen.