epactal

adjective
epac·​tal | \ (ˈ)ē¦paktᵊl, (ˈ)e¦p-, ə̇ˈp-\

Definition of epactal

of a bone
: occurring irregularly in the sutures of the skull — compare wormian bone

History and Etymology for epactal

probably from French épactal, from Greek epaktos + French -al

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