lunate bone

Main Entry: lunate bone
Function: noun
: a crescent-shaped bone that is the middle bone in the proximal row of the carpus between the scaphoid bone and the triquetral boneand that has a deep concavity on the distal surface articulating with the capitate called also lunate, semilunar bone

lunate bone n.
The second of three bones forming the proximal row of bones in the wrist between the scaphoid and triquetrum bones and articulating with the radius, scaphoid, triquetrum, hamate, and capitate bones. Also called semilunar bone.