noun
Meaning 1
Any of a class of minerals, mixed oxides of magnesium and iron, that are abundant in the earth's lower mantle (second only to perovskite)
Definition source: English Wiktionary via Wiktextract
Topics: chemistry, geography, geology, mineralogy, natural-sciences, physical-sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided