a form of oxygen, O3, with a peculiar odor suggesting that of weak chlorine, produced when an electric spark or ultraviolet light is passed through air or oxygen. It is found in the atmosphere in minute quantities, especially after a thunderstorm, is a powerful oxidizing agent, and is thus biologically corrosive. In the upper atmosphere, it absorbs ultraviolet rays, thereby preventing them from reaching the surface of the earth. It is used for bleaching, sterilizing water, etc.
- o·zon·ic [oh-zon-ik, oh-zoh-nik], /oʊˈzɒn ɪk, oʊˈzoʊ nɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use ozone in a sentence
Research suggested that air pollution from China contributes to up to 65 percent of the ozone increase in the Western United States.The Environmental Challenges of China's Recovery After COVID-19 | Yanzhong Huang | February 2, 2021 | Time
That stark variety of regional effects was evident in, for example, the different post-pandemic ozone levels in Denver and New York City.What the pandemic can teach us about ways to reduce air pollution | Carolyn Gramling | January 4, 2021 | Science News
The researchers determined that the chemical is formed when a preservative known as 6PPD reacts with ozone.Salmon are dying off and your car tires might be to blame | Kate Baggaley | December 4, 2020 | Popular-Science
At this elevation, ozone protects life on Earth from the sun’s harmful ultraviolet radiation.
Eastern San Diegans also live with more exposure to harmful ozone, a natural and important part of our atmosphere that turns deadly when it’s mixed with car pollution and sunlight.The Climate Problem Facing Coastal Building Height Limits | MacKenzie Elmer | October 20, 2020 | Voice of San Diego
Air pollution gets worse during drought; in California the problem is soot, and in Texas it was ozone.
Soot, methane, ozone, and HFCs are a lot less sexy than flying to Rio and making bold promises.Hillary Clinton’s Plan to Get Serious About Global Warming | David G. Victor, Charles F. Kennel, Veerabhadran Ramanathan | June 21, 2012 | THE DAILY BEAST
Obama enraged his base last week by nullifying an environmental regulation on ozone.
His first choice was Shri Trimurti Bhavan in ozone Park, a temple where his uncle is a priest.
The screening can be canceled, but people in Richmond Hill and ozone Park still have ways to see it.
Nothing—nothing but the smell of ozone and an echo bouncing crazily off the walls of the conduit.The Holes and John Smith | Edward W. Ludwig
He discharged the accumulated energy in a single blue flare that filled the lab with thunder and ozone.Security | Poul William Anderson
The Adriatic on our right, not near enough to see, but the air seemed impregnated with its ozone.From the Thames to the Tiber | J. Wardle
Let the sun put its coat of health on you, and let the ozone put the red blood of strength in your veins.Think | Col. Wm. C. Hunter
It was the season of fierce heat, but we faced the northern breezes full of invigorating ozone.The Passenger from Calais | Arthur Griffiths
British Dictionary definitions for ozone
a colourless gas with a chlorine-like odour, formed by an electric discharge in oxygen: a strong oxidizing agent, used in bleaching, sterilizing water, purifying air, etc. Formula: O 3; density: 2.14 kg/m³; melting pt: –192°C; boiling pt: –110.51°C: Technical name: trioxygen
informal clean bracing air, as found at the seaside
- ozonic (əʊˈzɒnɪk) or ozonous, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for ozone
An unstable, poisonous allotrope of oxygen having the chemical formula O3. Ozone forms in the atmosphere through the process of photolysis, when ultraviolet radiation from the Sun strikes oxygen molecules (O2), causing them to split apart. When freed oxygen atoms bump into and join other O2 molecules, they form ozone. Although ozone is broken down naturally in the atmosphere through chemical reactions with other atmospheric gases (such as nitrogen, hydrogen, and chlorine), in an unpolluted atmosphere the formation and breakdown of ozone is generally balanced, and the total concentration of ozone is relatively constant. The formation and destruction rates of ozone vary with altitude in the atmosphere, and with latitude. Most ozone forms in the 15 to 30 km (10 to 19 mi) altitude range and in latitudes closest to the equator where sunshine strikes the Earth the most. The ozone is then transported northward and southward by wind and is generally most concentrated in areas above the Canadian Arctic and Siberia and above Antarctica. Ozone is used commercially in water purification, in air conditioning, and as a bleach.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.