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Sphincter - Meaning, Definition & English Examples

A sphincter is a ring-shaped muscle that contracts to close or relaxes to open a passage in the body, such as those controlling digestion or urination. It regulates flow between organs.

sphincter

/ˈsfɪŋktər/ /ˈsfɪŋktə/

Definition:

A ring-shaped muscle that contracts to close an opening in the body.

Synonyms:

valve, constrictor, muscle ring

Part of Speech:

noun

Antonyms:

dilator, opener

Common Collocations:

anal sphincter, esophageal sphincter, urinary sphincter

Derivatives:

sphincteral, sphincteric

Usage Tips:

Use "sphincter" to refer to specific muscles controlling openings like the esophagus or anus in medical or anatomical contexts.

Common Phrases:

tight as a sphincter, sphincter control, relax the sphincter

Etymology:

From Greek "sphinkter," meaning "that which binds tight," derived from "sphingein" (to bind).

Examples:

  • 1. The doctor examined his esophageal sphincter for signs of dysfunction.
  • 2. She focused on relaxing her sphincter muscles during childbirth.
  • 3. The anal sphincter helps maintain continence by contracting when needed.
  • 4. Damage to the urinary sphincter can lead to incontinence issues.

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