Also found in: Thesaurus, Medical, Legal, Financial, Encyclopedia, Wikipedia.


(tĕst′to͞ob′, -tyo͞ob′)
1. Produced or cultivated in a test tube.
2. Produced, developed, or tested in a laboratory: test-tube corn.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

test′ tube`

a hollow cylinder of thin glass with one end closed, used in laboratory experimentation and analysis.


produced in or as if in a test tube; synthetic or experimental.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


(test) noun
1. a set of questions or exercises intended to find out a person's ability, knowledge etc; a short examination. an arithmetic/driving test.
2. something done to find out whether a thing is good, strong, efficient etc. a blood test.
3. an event, situation etc that shows how good or bad something is. a test of his courage.
4. a way to find out if something exists or is present. a test for radioactivity.
5. a test match.
to carry out a test or tests on (someone or something). The students were tested on their French; They tested the new aircraft.
test match
in cricket, (one of) a series of matches between teams from two countries.
test pilot
a pilot who tests new aircraft.
ˈtest-tube noun
a glass tube closed at one end, used in chemical tests or experiments.
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.
References in classic literature ?
"Here!" He held a test-tube between me and the light, and I noted the cloudy or muddy liquid it contained.
"Or here!" With quick, nervous movements among his array of test-tubes, he turned a white solution to a wine color, and a light yellow solution to a dark brown.
The narrow scientist with his nose in a test-tube cannot understand philosophy."
He wheeled round upon his stool, with a steaming test-tube in his hand, and a gleam of amusement in his deep-set eyes.
"You see, my dear Watson"--he propped his test-tube in the rack, and began to lecture with the air of a professor addressing his class--"it is not really difficult to construct a series of inferences, each dependent upon its predecessor and each simple in itself.
He dipped into this bottle or that, drawing out a few drops of each with his glass pipette, and finally brought a test-tube containing a solution over to the table.
If it turns red, it means a man's life." He dipped it into the test-tube and it flushed at once into a dull, dirty crimson.
Broad, low tables were scattered about, which bristled with retorts, test-tubes, and little Bunsen lamps, with their blue flickering flames.
Professor Hilton paused and glared at him, unsympathetic and unimaginative as one of his own test-tubes. He was professor of physics in the high school, possessor of a large family, a meagre salary, and a select fund of parrot-learned knowledge.
A double line of glass-stoppered bottles was drawn up upon the wall opposite the door, and the table was littered over with Bunsen burners, test-tubes, and retorts.
A formidable array of bottles and test-tubes, with the pungent cleanly smell of hydrochloric acid, told me that he had spent his day in the chemical work which was so dear to him.
Summary: Jalandhar (Punjab) [India], Jan 5 (ANI): In an absurd statement, Vice-Chancellor of Andhra University has said that Kauravas were born through stem cell research and test-tube technology.