Definitions
There is 1 meaning of the phrase
Test Tube.
Test Tube - as a noun
Glass tube closed at one end
Example Sentences
"She carefully held the test tube in her hand, making sure not to drop it."
"The scientist used a test tube to mix the chemicals together."
"The test tube contained a clear liquid that was ready for analysis."
"He heated the test tube over a Bunsen burner to observe the reaction."
"The test tube rack held several empty test tubes waiting to be used."
