やこうちゅう 夜光虫 LinksSentence search for 夜光虫Sentence search for やこうちゅうSentence search for ヤコウチュウKanji details for 夜, 光 and 虫Edit in JMdict Noun1. Noctiluca scintillans (luminescent species of dinoflagellate)Other formsヤコウチュウ Discussions Log in to talk about this word.