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Definition of "test tube" []

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

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "test tube" in a sentence
  • "Each mosquito was carried in a test tube stoppered with a piece of gauze."
  • "In the first part, they used materials in a test tube to measure the effect of alcohol, acetaldehyde, salsolinol TIQ, and enkephalin on the binding of natural enkephalin at its delta receptor sites."
  • "They homogenized material from the brain stem area of rats and combined it in a test tube with radioactive dopamine, vitamin C, and a chemical derived from nucleic acid called NAD."