test tube
test tube — noun
1. a glass container shaped like a narrow tube, open at the top and sealed at the b
a glass container shaped like a narrow tube, open at the top and sealed at the bottom, that scientists use to hold, mix, or heat small amounts of liquid during experiments
Ramón measured exactly ten millilitres into the test tube with a pipette.
measurement collocation: [number] [unit] into a test tube
Harper held the test tube over a flame and watched the liquid change colour.
test tube + heat/flame in lab experiments
Quan's test tube slipped and shattered, spraying glass across the lab bench.
Lotte arranged six test tubes on the metal rack beside the microscope.
Nora wrote the date on the side of each test tube with a marker.
- lab tube
informal, used in the same laboratory contexts but less precise
- culture tube
a specific type of test tube designed for growing bacteria or cells
文法句型
a test tube
test tubes (plural)
用法筆記
Always written as two separate words: 'test tube', not 'testtube' or 'test-tube' (though the hyphenated form appears as an adjective in phrases like 'test-tube baby').