palmar arch
noun
: either of two loops of blood vessels in the palm of the hand:
a
: a deeply situated transverse artery that is composed of the terminal part of the radial artery joined to a branch of the ulnar artery and that supplies principally the deep muscles of the hand, thumb, and index finger
called also deep palmar arch
b
: a superficial arch that is the continuation of the ulnar artery which anastomoses with a branch derived from the radial artery and that sends branches mostly to the fingers
called also superficial palmar arch
Cite this Entry
“Palmar arch.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/palmar%20arch. Accessed 4 Nov. 2025.
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