Definition of palmar arch in US English:

palmar arch

noun

Anatomy
  • 1(More fully "superficial palmar arch") an arterial arch that crosses the palm of the hand superficial to the flexor tendons, formed by the terminal portion of the ulnar artery and a superficial branch of the radial artery.

  • 2(More fully "deep palmar arch") an arterial arch that crosses the palm deep to the flexor tendons, formed by the terminal portion of the radial artery and a deep branch of the ulnar artery.

Origin

Late 18th century.