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 What works in a mouse or a test tube may not work in people, however, and CAR T cell treatment can be dangerous. — Jon Cohen, Science | AAAS, "Can an immune strategy used to treat cancer also wipe out HIV infections?," 7 Aug. 2019 Some of the most interesting research done so far has been in test tubes or animals only, showing potential links between molecular hydrogen and neurological benefits. — Jaclyn London, Ms, Rd, Cdn, Good Housekeeping, "The Truth About Hydrogen Water and Its Benefits, According to a Nutritionist," 29 Aug. 2019 Ball stressed that the experiments had been done in test tubes, using knobs of Ebola grafted onto a harmless virus. — Richard Preston, The New Yorker, "Is Ebola Evolving Into a More Deadly Virus?," 7 Aug. 2019 Upcoming weekend workshops include block printing, sashiko embroidery, upcycled self-watering planter, test tube propagation station and DIY Bitters, in which folks 21 years old and up will create a custom blend. — Dewayne Bevil, orlandosentinel.com, "Orlando Science Center: Stargazing, DIY mouse-ear headband sessions set for late-night event," 2 July 2019 Generally, each test recommends swabbing your dog’s cheek for between 20 seconds and a minute before replacing the collection in a test tube and mailing the sample to the lab. — Lizz Schumer, Good Housekeeping, "I Tried the Most Popular Dog DNA Tests to Find the Best One," 22 May 2019 And isolating a protein in a test tube gives only partial answers, because within the organism, proteins nestle together, altering each other’s chemistry or holding each other in the right shape. — Quanta Magazine, "How Heat Kills Cells," 9 May 2017 For a summer centerpiece, pile green apples on a breadboard; among the apples, insert test tubes containing white garden flowers; then garnish the arrangement with parsley. 6. — Maggie O'neill, Good Housekeeping, "25 Practical Tips for Flower Arrangements From 1952," 7 May 2015 In a test tube, the resulting fusion antibodies could neutralize flu strains that neither of their single constituents could alone. — Diana Gitig, Ars Technica, "Llama “nanobodies” might grant universal flu protection," 5 Nov. 2018

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.