inversion, thermal

In meteorology, a situation in which a layer of warm air (an inversion layer) lies over a layer of cool air.

Nearby words

  1. inversion,
  2. inversion casting,
  3. inversion layer,
  4. inversion of uterus,
  5. inversion therapy,
  6. inversive,
  7. invert,
  8. invert soap,
  9. invert sugar,
  10. invertase


If an inversion occurs over a city, it results in air pollution, because some pollutants, such as smoke or soot, which are usually removed by normal weather processes, are held at the surface by the cool layer. (See smog.)

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.