noun Date: 1869 a crystalline compound OsO 4 that is an oxide of osmium, has a poisonous irritating vapor, and is used as a catalyst, oxidizing agent, and biological fixative and stain
OSMIUM TETROXIDE
Meaning of OSMIUM TETROXIDE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012