radiation
|ra-di-a-tion|
/ˌreɪdiˈeɪʃən/
energy emission
Etymology
'radiation' originates from Latin, specifically the word 'radiatio,' where 'radius' meant 'ray' or 'beam.'
'radiatio' transformed into the French word 'radiation,' and eventually became the modern English word 'radiation' through Middle English.
Initially, it meant 'a ray or beam of light,' but over time it evolved into its current meaning of 'emission of energy as electromagnetic waves.'
Meanings by Part of Speech
Noun 1
the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization.
The radiation from the sun is essential for life on Earth.
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Noun 2
the process of radiating heat or light.
The radiation of heat from the fire kept us warm.
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Last updated: 2025/01/11 11:35