noun Etymology: New Latin, from Greek bēryllion Date: circa 1847 a steel-gray light strong brittle toxic divalent metallic element used chiefly as a hardening agent in alloys
BERYLLIUM
Meaning of BERYLLIUM in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012