hyaloid artery

n.
  1. The terminal branch of the primitive ophthalmic artery, which forms in the embryo an extensive ramification in the primary vitreous and vascular tunic around the lens and which is usually atrophied by the time of birth.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.