窒ちっ素そ酸さん化か物ぶつちっそさんかぶつMeanings1nounnitrogen oxideTechnical term used in chemistry and environmental science. Refers to compounds composed of nitrogen and oxygen, such as NO and NO₂.自じ動どう車しゃの排はい気きガスには窒ちっ素そ酸さん化