beryllium
/bəˈɹɪl.i.əm/ noun C2- The chemical element (symbol Be) with an atomic number of 4; a soft silvery-white low density alkaline earth metal with specialist industrial applications.
- An atom of this element.
Plural berylliums
Learn beryllium in real texts
With a free account, hover any word in the library for its meaning, hear it read aloud, save words for review timed to your memory, and see how much of each book you already know.