sphincter

IPA: sfˈɪŋktɝ

(anatomy) 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.

Examples of "sphincter" in Sentences

Internal sphincter muscle of urethra.
External sphincter muscle of male urethra.
In most people, the anal sphincter is weak.
External sphincter muscle of female urethra.
The 'sphincter pupillae' constricts the iris.
And an artificial sphincter is under development.
Sphincter of Oddi dysfunction is a rare condition.
This is due to neuropathy of the bladder sphincter.
Iridoplegia is the paralysis of the sphincter of the iris.
My sphincter is technically precise too Michael. papasanchez
The cervix being a sphincter is built to let out cantelopes.
Endoanal ultrasound evaluates the structure of the anal sphincters.
I would say with Hillary the sphincter is a bit too tightly would for true Killer status!
There is one test I REALLY hope they don't do - it is called the sphincter EMG nerve conduction test.
This is called the lower esophageal sphincter, which is a thick ring of circular smooth muscle at the point between the esophagus and the stomach.
As a leader of non-profit I have learned that Starbucks’ sphincter is so tight if they squeezed out a free coffee bean it would come out looking like a diamond.
Your internal sphincter, which is directly behind it, is controlled by your autonomic nervous system and, like your heartbeat, works without your thinking about it.