: a plain or lipped tube usually of thin glass closed at one end and used especially in chemistry and biology
Examples of test-tube in a Sentence
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Scott Lafee, San Diego Union-Tribune, 30 Dec. 2025
May Protect Against Cancer Some test-tube and animal studies suggest that compounds found in wasabi, including isothiocyanates, may help slow the growth of cancer cells.
—Lindsey Desoto, Health, 17 Dec. 2025
Keith Cooper, Space.com, 5 Jan. 2026
The Estate Collection by the Glass Gift Set from Daou Vineyards, for example, offers three luxury red blends in 100-milliliter bottles, which look a bit like test tubes.
—Bloomberg, Mercury News, 31 Dec. 2025
See All Example Sentences for test-tube
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Adjective
The world’s first test-tube baby was Louise Brown, born in England three years earlier.
—Scott Lafee, San Diego Union-Tribune, 30 Dec. 2025
May Protect Against Cancer Some test-tube and animal studies suggest that compounds found in wasabi, including isothiocyanates, may help slow the growth of cancer cells.
—Lindsey Desoto, Health, 17 Dec. 2025
Noun
Hirakawa's team argue that their research is the first time that RNA has been produced in the lab without humans getting involved, although critics argue that even the act of putting all the building blocks of RNA together in a test tube is a human intervention.
—Keith Cooper, Space.com, 5 Jan. 2026
The Estate Collection by the Glass Gift Set from Daou Vineyards, for example, offers three luxury red blends in 100-milliliter bottles, which look a bit like test tubes.
—Bloomberg, Mercury News, 31 Dec. 2025
See All Example Sentences for test-tube
Cite this Entry
“Test-tube.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/test-tube. Accessed 6 Jan. 2026.
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