 Two small test tubes held in spring clamps | |
| Other names | Culture tube |
|---|---|
| Uses | Chemical reaction |
| Related items | Vacutainer Boiling tube Centrifuge tube |
A test tube, also known as a culture tube or sample tube, is a common piece of laboratory glassware consisting of a finger-like length of glass or clear plastic tubing, open at the top and closed at the bottom.
Test tubes are usually placed in special-purpose racks.