Checking saved dictionary data and trusted language sources. This will stop automatically if a source does not respond.
Pronunciation varies by accent · noun
(mineralogy) A trigonal-pyramidal rare earth borosilicate mineral..
Use stillwellite when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Stillwellite means (mineralogy) A trigonal-pyramidal rare earth borosilicate mineral..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use stillwellite where its definition matches the intended context.
FreeDictionaryAPI.com / Wiktionary · Original source · CC BY-SA 4.0
Dictionary data is provided by FreeDictionaryAPI.com and sourced from Wiktionary under its stated license.