sphincter

Definition

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.

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”).

Example Sentences

• "the sphincter of the bladder"
• "the iris sphincter in the eye"
• "She decided that she would force him to climax first by the sheer strength of her young animal control, the strength of her sphincters […]"

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