rubber stopper Meaning

Rubber Stopper

Definition: A rubber stopper is a cylindrical or tapered plug made from rubber or a rubber-like material that is used to seal vessels, such as laboratory glassware (flasks, test tubes, etc.), bottles, and other containers to prevent the loss of liquids or gases. They often come with a hole in the center, known as a “bore,” to allow for the insertion of tubes or syringes for sampling or adding substances without removing the stopper completely.

Usage: Rubber stoppers are widely used in laboratory settings as well as in industry for sealing containers. In laboratories, they help maintain sterile conditions and prevent contamination. In industries, they may be used to seal products in shipping to ensure they remain unchanged during transport.

Etymology: The term “rubber” originates from the 17th-century word “rubber,” which was derived from the action of rubbing, reflecting its initial use for erasing pencil marks. The name “stopper,” which dates back to the early 13th century, comes from the Old English “stophian,” meaning “to stop up or close.”

Pronunciation: /ˈrʌbər ˈstɑːpər/

Synonyms:

• Cork (in some contexts, though technically different)
• Plug
• Seal

Antonyms:

• Opener
• Vent (as it serves the opposite function)

Additional Context:

Rubber stoppers are often graded or classified by their size and the size of the bore, which dictates compatibility with various containers. They can also be treated or manufactured to withstand different chemicals or temperature ranges, enhancing their usefulness in various scientific and industrial applications. In some cases, the term “stopper” can be used more broadly to refer to any type of device that serves to block an opening, but the specific term “rubber stopper” usually implies a certain flexibility and resilience due to the material used.

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