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/bəˈɹɪl.i.əm/ · noun
(uncountable) The chemical element (symbol Be) with an atomic number of 4; a soft silvery-white low density alkaline earth metal with specialist industrial applications..
Use beryllium when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Beryllium means (uncountable) The chemical element (symbol Be) with an atomic number of 4; a soft silvery-white low density alkaline earth metal with specialist industrial applications..
Common synonyms include glucinium, glucinum, atomic number 4, be.
The opposite depends on the specific sense.
Use beryllium where its definition matches the intended context.
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