Hamate bone
Skeleton ยท part of Bones of free part of upper limb
The hamate bone (from Latin hamatus, 'hooked'), or unciform bone (from Latin uncus, 'hook'), Latin os hamatum and occasionally abbreviated as just hamatum, is a bone in the human wrist readily distinguishable by its wedge shape and a hook-like process ("hamulus") projecting from its palmar surface. (Wikipedia)