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arterial spider

n.
  1. A telangiectatic arteriole in the skin having capillary branches that radiate from a central area in a manner similar to legs from the body of a spider.spider nevus spider telangiectasia vascular spider
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.