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test tube

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a tube of thin, transparent glass closed at one end, used in chemical experiments, etc.

adjective

made in or as in a test tube; experimental
produced by artificial insemination: a test-tube baby

See test tube in American Heritage Dictionary 4

noun

A clear, cylindrical glass tube usually open at one end and rounded at the other, used in laboratory experimentation.

adjective

Produced or cultivated in a test tube.
Conceived by or developed from artificial insemination.

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