test tube

• Recipiente delgado de vidrio o plástico, generalmente de forma cilíndrica y abierto por un extremo, utilizado en laboratorios científicos para contener, mezclar o calentar pequeñas cantidades de sustancias durante experimentos.

A thin glass or plastic container, typically cylindrical and open at one end, used in scientific laboratories for holding, mixing, or heating small quantities of substances during experiments.

1. Laboratory containerB1formal

   A thin glass or plastic tube, closed at one end, used in scientific experiments to hold small amounts of substances.

   Tubo de ensayo

   • The chemist carefully poured the liquid into a test tube.
   • She labeled each test tube with the sample name.
   • The test tube was heated over a Bunsen burner.

2. B2informal

   Used in the phrase 'test-tube baby' to refer to a baby conceived through in vitro fertilization (IVF).

   Fecundación in vitro

   • The first test-tube baby was born in 1978.
   • Many couples turn to test-tube technology to conceive.
   • The clinic specializes in test-tube fertilization procedures.