発光体(はっこうたい)

はっこうたい
noun
luminous body; light-emitting object
science
1. luminous body; light-emitting object; light source
Any object that produces or emits light, whether natural (such as stars or fireflies) or artificial (such as LEDs or fluorescent tubes).
太陽(たいよう)は巨大(きょだい)な発光体(はっこうたい)である。
The sun is a massive luminous body.
暗闇(くらやみ)の中(なか)で小(ちい)さな発光体(はっこうたい)が見(み)えた。
A small luminous object was visible in the darkness.
ホタルは自然界(しぜんかい)における発光体(はっこうたい)の代表的(だいひょうてき)な例(れい)だ。
Fireflies are a classic example of luminous bodies in nature.

A compound of 発光(はっこう) (luminescence; light emission) and 体(たい) (body; object). Used in scientific, technical, and descriptive contexts to refer to anything that emits light.

Common collocations

  • 自然(しぜん)発光体(はっこうたい): natural luminous body
  • 人工(じんこう)発光体(はっこうたい): artificial light source
  • 発光体(はっこうたい)の明(あか)るさ: brightness of a light source

Similar words

  • 光源(こうげん): light source — more common in everyday and technical use
  • 蛍光体(けいこうたい): fluorescent material — specifically a substance that glows when excited by radiation
  • LED: LED (light-emitting diode) — a specific modern technology for light emission
general
Added 2026.4.29 22:41 · Revised 2026.9.2 13:02
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