What does 細菌 mean?
細菌 is a Japanese noun meaning “bacillus, bacterium, germ” in English. It is written as 細菌 in kanji, さいきん in hiragana, and saikin in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
この化学薬品は細菌の繁殖を防ぐだろう。
This chemical will prevent germs from breeding.