test tube
1 of 1noun/ˈtɛst tub/
Forms:test tubes
1
a cylindrical glass or plastic tube used to hold, mix, or heat small amounts of liquids or gases in a laboratory setting
A test tube is a small, glass or plastic tube used in laboratories to hold, mix, or heat liquids and chemicals during experiments. It is usually cylindrical, with a rounded bottom and an open top. Test tubes are often used to conduct small-scale reactions or to observe changes in substances. They are typically held in a test tube rack to keep them upright and can be easily handled with test tube tongs or clamps when heated. Test tubes are commonly used in science classrooms, research labs, and medical testing.
- The scientist carefully added the solution to the test tube for the experiment.
- She used a test tube to mix the chemicals together in the lab.
- The teacher showed us how to heat the liquid in the test tube safely.
- After the reaction, the contents of the test tube turned a different color.
- I accidentally broke a test tube while cleaning the lab.