beryllium
noun
be·ryl·li·um
bə-ˈri-lē-əm 
: a chemical element of the alkaline earth metal group with atomic number 4 that occurs naturally in minerals such as beryl and is steel-gray in color, light and strong but brittle, and is used chiefly as a hardening agent in alloys see Chemical Elements Table
Examples of beryllium in a Sentence
Recent Examples on the Web
According to the Personal Care Products Council, counterfeit cosmetics can come laced with carcinogens like arsenic, beryllium, and cadmium, as well as dangerous levels of aluminum, mercury, and bacteria.
—
Boutayna Chokrane, Wired News, 8 July 2025
The team has also procured much of the stainless steel structural material but still faces long lead times on beryllium.
- YouTube www.youtube.com
Slow regulatory guidance is a broader underlying challenge.
—IEEE Spectrum, 30 June 2025
The report examined titanium, lithium, beryllium, and magnesium supply chains in particular, analysing PRC policy documents, government shipping records, in addition to academic articles, and other documents.
—Dr. Ewelina U. Ochab, Forbes.com, 15 June 2025
High-speed subatomic particles raining down from solar storms slam into the nitrogen in our atmosphere to create an isotope called beryllium 10, or Be-10, which can be captured in polar ice after falling to Earth’s surface.
—Phil Plait, Scientific American, 1 May 2025
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Boutayna Chokrane, Wired News, 8 July 2025
The team has also procured much of the stainless steel structural material but still faces long lead times on beryllium.
- YouTube www.youtube.com
Slow regulatory guidance is a broader underlying challenge.
—IEEE Spectrum, 30 June 2025
The report examined titanium, lithium, beryllium, and magnesium supply chains in particular, analysing PRC policy documents, government shipping records, in addition to academic articles, and other documents.
—Dr. Ewelina U. Ochab, Forbes.com, 15 June 2025
High-speed subatomic particles raining down from solar storms slam into the nitrogen in our atmosphere to create an isotope called beryllium 10, or Be-10, which can be captured in polar ice after falling to Earth’s surface.
—Phil Plait, Scientific American, 1 May 2025
See All Example Sentences for beryllium
Cite this Entry
“Beryllium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/beryllium. Accessed 20 Jul. 2025.
Copy CitationKids Definition
beryllium
noun
be·ryl·li·um
bə-ˈril-ē-əm
: a steel-gray light strong brittle toxic metallic element used chiefly to help harden alloys see element
Medical Definition
beryllium
noun
be·ryl·li·um
bə-ˈril-ē-əm
: a steel-gray light strong brittle toxic bivalent metallic element used chiefly as a hardening agent in alloys
—symbol Be
see Chemical Elements Table
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