発光|はっこうhakkou[0]heiban (flat)

Common
Definitions
  1. noun, suru verb, intransitive verbemission (of light); radiation (of light); luminescence
Conjugation
Dictionary form発光する(はっこうする)
Polite (masu)発光します(はっこうします)
Negative (nai)発光しない(はっこうしない)
polite (masen)発光しません(はっこうしません)
classical zu / nu発光せず・発光せぬ(はっこうせず・はっこうせぬ)
Past (ta)発光した(はっこうした)
polite (mashita)発光しました(はっこうしました)
Past negative (nakatta)発光しなかった(はっこうしなかった)
polite (masen deshita)発光しませんでした(はっこうしませんでした)
Te form発光して(はっこうして)
Potential発光できる(はっこうできる)
Passive発光される(はっこうされる)
Causative発光させる(はっこうさせる)
Causative passive発光させられる(はっこうさせられる)
Conditional (ba)発光すれば(はっこうすれば)
tara発光したら(はっこうしたら)
Volitional発光しよう(はっこうしよう)
polite (mashou)発光しましょう(はっこうしましょう)
Imperative発光しろ(はっこうしろ)

Common forms generated by rule; see the senses for honorific or irregular usage.

Synonyms & antonyms
  • Synonym放光ほうこうWrittenEmitting rays of light; rare and found in written prose, while 「発光」 is the more common technical term.
  • Synonym射光しゃこうWrittenLight beaming or shining out; rare and written/formal, with the nuance of rays shooting outward.
  • Related放射ほうしゃNeutralRadiating outward in all directions; also radiation. Broader than 「発光」 and not limited to light.
  • Related照射しょうしゃNeutralA light or lamp; also luring deer with a torch at night. It is the light source itself, not the emission of light. Shining light on something is 「照射(しょうしゃ)」.
  • Antonym消光しょうこうNeutralAntonym: the extinction of light or quenching of fluorescence; can also mean passing one's time.
  • Antonym吸光NeutralAntonym: absorbing light rather than emitting it, the opposite of 「発光」.

Use 「発光」 when an object gives off light itself, as in 「発光ダイオード」 and 「発光体」. For radiating in all directions, including non-light radiation, use 「放射」; for a lamp or light, 「灯」; the opposite of emitting light is 「吸光」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

Japanese definitions
  1. 光ひかりを出だすこと。
Kanji in this word
English equivalents

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