: 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
Recent Examples on the Web
Emily Mullin, Wired News, 7 Apr. 2025
National Geographic harnesses some of that tendency in this kit that contains instructions and equipment for 15 different gross experiments with themes like boiling boogers, farting slime, bursting blood cells, eyeballs, and test-tube vomit.
—Cheryl Fenton, Parents, 5 Dec. 2024
Brittany Poulson, People.com, 8 July 2025
The research team used test tube experiments and found that oxalic acid caused tiny amount of gadolinium to precipitate from the contrast agent and form nanoparticles, which infiltrated cells of different organs.
—John W. Dean, MSNBC Newsweek, 7 Apr. 2025
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Adjective
After developing into an embryo in a test-tube, it’s implanted into the womb of a female surrogate animal.
—Emily Mullin, Wired News, 7 Apr. 2025
National Geographic harnesses some of that tendency in this kit that contains instructions and equipment for 15 different gross experiments with themes like boiling boogers, farting slime, bursting blood cells, eyeballs, and test-tube vomit.
—Cheryl Fenton, Parents, 5 Dec. 2024
Noun
Research, mostly on animals or in vitro studies (performed or taking place in a test tube, culture dish, or elsewhere outside a living organism), has shown that sulforaphane may inhibit several types of cancers, including prostate cancer.
—Brittany Poulson, People.com, 8 July 2025
The research team used test tube experiments and found that oxalic acid caused tiny amount of gadolinium to precipitate from the contrast agent and form nanoparticles, which infiltrated cells of different organs.
—John W. Dean, MSNBC Newsweek, 7 Apr. 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 7 Aug. 2025.
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