sphincter muscle of pupil

n.

A ring of smooth muscle fibers surrounding the pupillary border of the iris.

Nearby words

  1. spherulite,
  2. sphery,
  3. sphincter,
  4. sphincter muscle of common bile duct,
  5. sphincter muscle of pancreatic duct,
  6. sphincter muscle of pylorus,
  7. sphincter muscle of urethra,
  8. sphincter muscle of urinary bladder,
  9. sphincteralgia,
  10. sphincterate


The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.