test-tube

adjective

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\ ˈtes(t)-ˌt(y)üb

Definition of test-tube

(Entry 1 of 2)

1 : in vitro test-tube experiments

2 : produced by in vitro fertilization test-tube babies

test tube

noun

Definition of test tube (Entry 2 of 2)

: 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: Noun All this study showed is that when human liver cells in a test tube is exposed to the components of the Pfizer Covid-19 mRNA vaccine, the liver cells do take up the vaccine components fairly rapidly. — Bruce Y. Lee, Forbes, 2 May 2022 But Braschi invites us to drink it in a test tube, rather than bite and chew it. — Silvia Marchetti, CNN, 17 Mar. 2022 Each morning on the ship began with a rather visceral ritual, which — sorry, probably TMI — involved spitting into a test tube, which was promptly collected for testing. — Paul Brady, Travel + Leisure, 7 Jan. 2022 Put a portion of one’s poop in a test tube, write the date on it, and send it to the lab. — Lauren Weber, CNN, 10 Mar. 2022 Dissolve the bead, collect all the liquid in the bottom of the test tube, then stick it in the Detect hub to process for an hour. — Anthony Karcz, Forbes, 29 Dec. 2021 If the disease of interest is also in the test tube, the nanobodies will pull it in, forming microscopic clumps. — Melina Walling, The Arizona Republic, 15 Feb. 2022 Cannabinoids, chemical compounds in the cannabis plant, have long been demonstrated to kill cancer cells in test tube experiments, according to Dr. Donald Abrams, an integrative oncologist at the University of California-San Francisco. — Sudiksha Kochi, USA TODAY, 10 Feb. 2022 Climate models put the planet in a digital test tube. — Robert Lee Hotz, WSJ, 6 Feb. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'test-tube.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.