varicose vein

n.
  1. An abnormally dilated or swollen vein.
  2. varicose veins The condition of having abnormally dilated or swollen veins, especially in the legs.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.