Emission

Part of Speech

Noun

Pronunciation

/ɪˈmɪʃən/

Definitions

1. The act of sending out or discharging something, especially gas, heat, or radiation.

2. A substance or energy released into the environment, especially as a result of a process or activity (e.g., carbon emissions, sound emissions).

3. The release of light, sound, or heat from a source, especially in physics and environmental science contexts.

Usage Examples

1. The emission of carbon dioxide from industrial plants contributes to global warming.

2. The scientist measured the emission of light from the glowing material.

3. The reduction in automobile emissions is a key factor in environmental policy.

Etymology

Derived from the Latin word "emissio," meaning "a sending out" or "dispatch," from "emittere," which means "to send out." The term evolved through Old French before entering English during the late Middle Ages.

Synonyms

• Discharge
• Release
• Exhalation
• Outflow
• Radiation

Antonyms

• Absorption
• Inhalation
• Intake
• Retention

Translations

Regional Pronunciation Variations

• In American English, "emission" is pronounced with a stronger emphasis on the second syllable: /ɪˈmɪʃən/.
• In British English, the pronunciation may have a softer 'i' sound in the first syllable: /ɪˈmɪʃən/ with a clear distinction in stress.

Historical Usage

The word "emission" has been in use since the early 1600s, initially describing the release of substances like light or gas. It was later adopted in more technical and scientific contexts, particularly in physics, chemistry, and environmental studies. Over time, the term expanded to cover various forms of discharge, from gases released by factories to electromagnetic radiation.

Cultural Nuances

The concept of emission plays a significant role in discussions of climate change, where emissions of greenhouse gases like CO2 have become central to environmental and political discourse. In many cultures, reducing emissions is considered a moral imperative, with efforts ranging from technological innovations to policy changes aimed at minimizing their impact on the planet.

More Information

Emission refers to the process of releasing energy or matter from a source into the environment. This can be physical matter, like gases, particles, or liquids, or it can refer to energy, such as light, heat, or radiation. Emissions are often discussed in environmental sciences due to their impact on ecosystems and human health. The most commonly known types of emissions today include carbon dioxide emissions from fossil fuel burning, but emissions can also refer to the release of other substances in a variety of contexts, such as medical, technological, or industrial fields.