1. pupillary sphincter

noun. A ring of smooth muscle surrounding the iris.
Synonyms
optic oculus sphincter anatomical sphincter musculus sphincter pupillae eye sphincter muscle
Antonyms
effector inattention
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2. sphincter

noun. A ring of muscle that contracts to close an opening.
Synonyms
musculus sphincter vesicae sphincter ani musculus sphincter ductus pancreatici urethral sphincter musculus sphincter ductus choledochi pyloric valve sphincter muscle bladder sphincter anal sphincter musculus sphincter ani musculus musculus sphincter urethrae pupillary sphincter musculus sphincter pupillae musculus sphincter pylori pyloric sphincter anatomical sphincter physiological sphincter muscle
Etymology
sphincter (English)
sphincter (Latin)
σφιγκτήρ (Ancient Greek (to 1453))
σφίγγω (Ancient Greek (to 1453))
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