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
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That is, the process that (within the first three minutes after the big bang) produced the first light elements --- hydrogen, helium, and tiny amounts of lithium and beryllium.
—
Bruce Dorminey, Forbes.com, 12 Aug. 2025
In addition to the impending shipments of elevated radioactivity wastes from New York, Wayne Disposal, off I-94 near the Willow Run Airport in Wayne County's Van Buren Township, was receiving elevated-radioactivity wastes from another FUSRAP site, a long-shuttered beryllium plant in Luckey, Ohio.
—Keith Matheny, Freep.com, 8 Aug. 2025
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
Local employees worked for three divisions: Compensation Analysis and Support, which provided scientific support for claims involving Department of Energy workers with cancer caused by exposure to radiation, beryllium and silica.
—Patricia Gallagher Newberry, The Enquirer, 2 July 2025
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Bruce Dorminey, Forbes.com, 12 Aug. 2025
In addition to the impending shipments of elevated radioactivity wastes from New York, Wayne Disposal, off I-94 near the Willow Run Airport in Wayne County's Van Buren Township, was receiving elevated-radioactivity wastes from another FUSRAP site, a long-shuttered beryllium plant in Luckey, Ohio.
—Keith Matheny, Freep.com, 8 Aug. 2025
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
Local employees worked for three divisions: Compensation Analysis and Support, which provided scientific support for claims involving Department of Energy workers with cancer caused by exposure to radiation, beryllium and silica.
—Patricia Gallagher Newberry, The Enquirer, 2 July 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 9 Sep. 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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