Vacutainer

Part of speech: noun

Definitions

1. A type of blood collection tube designed to hold a vacuum that draws blood into it for sampling and laboratory testing
2. A sealed tube equipped with a vacuum to facilitate the collection of blood samples without the risk of contamination
3. A specialized container used in medical procedures to collect blood by creating negative pressure, ensuring sterility and accuracy in sample collection

Etymology: Vacutainer began as a trademark, a blend of "vacuum" and "container" coined for a blood collection tube that is evacuated so that it draws a set volume of blood when a needle pierces its stopper. The name describes the mechanism in its two halves: the empty space inside is the vacuum, and the glass or plastic vessel holding it is the container. Because the product was branded before the name became a common noun, the word followed a familiar path. Trademarks that became generic terms, such as escalator or aspirin, lost their capital letters and their ownership in everyday speech, and this one now serves as the ordinary name for the tube in clinical settings. Most people outside medicine would not recognise it at all, which is typical of technical blends of this kind.