noun
- Visible trails left by aircraft, typically attributed in conspiracy theories to the deliberate spraying of chemical or biological agents into the atmosphere.
Usage: informal; often used in conspiracy theories; scientific consensus attributes these trails to water vapor condensation (contrails), not chemical spraying
Examples
- Some people believe chemtrails are used to control the weather or population.
- The white lines behind the airplane are chemtrails, according to the conspiracy theory.
- Scientists explain that what people call chemtrails are actually condensation trails formed by engine exhaust.
- Online forums are filled with discussions about chemtrails and their alleged effects.
- The chemtrail theory lacks credible scientific evidence.