Definition

1. Noun:
   • The act of sending something out: "Emission" refers to the process of releasing or discharging something, such as light, heat, gas, or sound, from a source.
   • Something that is sent out: "Emission" can also refer to the substance or form of energy that is released, like a gas or a beam of light.
   • A bodily discharge: In biology and medicine, "emission" describes a process where a substance leaves the body.

Examples of Usage

• Noun:
  • The new regulations aim to reduce carbon emission from vehicles.
  • The emission of light from the firefly was beautiful to watch.
  • The doctor discussed nocturnal emission with the patient.

Advanced Usage

• "Zero-emission": producing no harmful substances released into the air.
  • The company is investing in zero-emission technology for its factories.
• "Emission control": the methods used to limit pollutants released from a source.
  • Strict emission control standards are necessary for clean air.

Variants and Related Words

• Emit (verb): to send out or give off (light, sound, gas, etc.).
  • The machine emits a loud noise when it starts.
• Emissive (adjective): having the power to emit radiation or light.
  • The material has high emissive properties.

Synonyms

• Discharge: the action of releasing a substance.
• Release: the action of setting something free.
• Radiation: the emission of energy as electromagnetic waves.

Related Phrases

• Emission spectrum: the range of wavelengths of electromagnetic radiation emitted by a source.
  • Scientists analyzed the star's emission spectrum.
• Emission factor: a coefficient quantifying the emissions released per unit of activity.
  • Calculating the emission factor is key for the environmental report.

Related Idioms

(This word is not commonly used in idiomatic expressions. Its usage is primarily technical and literal.)

Noun

1. the occurrence of a flow of water (as from a pipe)
2. any of several bodily processes by which substances go out of the body
   • the discharge of pus
3. the release of electrons from parent atoms
4. a substance that is emitted or released
5. the act of emitting; causing to flow forth