noun
Meaning 1
A trigonal-ditrigonal pyramidal bluish black mineral composed of a basic, hydrated aluminate / borate / silicate of iron and sodium
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