Englishosmium tetroxidenounMeaningAn oxide of the metal osmium, OsO4; it is very poisonous, has a pungent smell and can cause blindness; it is a powerful oxidizing agent, and is used to stain biological materials.Related wordsosmide(English)osmic acid(English)diosmium(English)tetroxide(English)teroxide(English)osmite(English)oxythiomolybdate(English)sulphur trioxide(English)SourcesDictionaryAPI.dev English dictionary data