hand rays

hand rays

the four radial grooves that separate five slightly thicker areas of the hand plates; they indicate the formation of the metacarpals and phalanges of the hand.

hand rays

(hand rāz)
The four radial grooves that separate five slightly thicker areas of the hand plates; they indicate the formation of the metacarpals and phalanges of the hand.
Synonym(s): digital rays of hand.
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