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Meaning of test tube

test' tube"

Pronunciation: [key]
  1. a hollow cylinder of thin glass with one end closed, used in chemical and biological experimentation and analysis.

test-tube

Pronunciation: (test'tb", -tyb"), [key]
— adj.
  1. produced in or as if in a test tube; synthetic or experimental.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.