Crossword clue: combined with a relatively large amount of oxygen; -- said of higher oxides.
2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
Combined with a relatively large amount of oxygen; -- said of higher oxides. [Obs.]
Combined with a relatively large amount of oxygen; -- said of higher oxides. [Obs.]