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(tĕst′to͞ob′, -tyo͞ob′)
1. Produced or cultivated in a test tube.
2. Produced, developed, or tested in a laboratory: test-tube corn.

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.


(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.
References in classic literature ?
I've found it," he shouted to my companion, running towards us with a test-tube in his hand.
He held a test-tube between me and the light, and I noted the cloudy or muddy liquid it contained.
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.
He dipped it into the test-tube and it flushed at once into a dull, dirty crimson.
Professor Hilton paused and glared at him, unsympathetic and unimaginative as one of his own test-tubes.
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.
Cultured meat, as it is called, captured the imaginations of techies, environmentalists and animal rights groups--including People for the Ethical Treatment of Animals (PETA), which, in 2008, offered $1 million to the first person to develop and market a test-tube chicken.