Sphincter
//ˈsfɪŋk.tɚ// noun
noun ·Uncommon ·Advanced level
Definitions
Noun
- 1 A ringlike band of muscle that surrounds a bodily opening (such as the anus or the openings of the stomach), constricting and relaxing as required for normal physiological functioning.
"the sphincter of the bladder"
- 2 a ring of muscle that contracts to close an opening wordnet
Example
More examples"Your sphincter is the muscle at the end of your digestive tract."
Etymology
Etymology tree Late Latin sphinctērlbor. English sphincter Learned borrowing from Late Latin sphinctēr (“the muscle of the anus”), from Ancient Greek σφῐγκτήρ (sphĭnktḗr, “lace, band; contractile muscle”), ultimately of Pre-Greek origin. Possibly related to sphinx (“the strangler”).
Related phrases
More for "sphincter"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.