放射能|ほうしゃのうhoushanou[3]nakadaka (mid-high)

JLPT N1approx.Common
Definitions
  1. nounradioactivity
    もう一ひとつの面白おもしろいエネルギー源えねるぎーげんは、放射能ほうしゃのうの廃棄はいき物質ぶっしつから取り出とりだせる熱ねつである。↗
    Another interesting source of energy is the heat that can be recovered from radioactive waste material.
  2. nounradiation
  3. nounradioactive material
Synonyms & antonyms
  • Related放射線ほうしゃせんNeutralRefers to the rays themselves, e.g. α and γ rays. 「放射能」 properly means the ability to emit such rays, though colloquially it also covers rays and radioactive material.
  • Related放射ほうしゃNeutralThe phenomenon of emitting outward, as of light or heat. 「放射能」 refers specifically to radioactivity, not the act of radiating.
  • Related輻射ふくしゃWrittenWritten/formal prose term for radiation of heat or electromagnetic waves, as in 「輻射熱」. Everyday speech uses 「放射」.

Use 「放射能」 for the ability or property of emitting radiation (colloquially also radioactive material, as in 「放射能汚染」); 「放射線」 for the rays themselves; 「放射」 for the act of radiating; 「輻射」 for heat radiation in formal writing.

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

Japanese definitions
  1. 放射線ほうしゃせんを出だす能力のうりょく・性質せいしつ。
  2. (誤用ごよう・俗用ぞくよう)放射線ほうしゃせん。放射性ほうしゃせい物質ぶっしつ。
Kanji in this word

JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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