Definition of rigbone in English:

rigbone

(also rigbane, rigbeean, riggbeean)

Pronunciation /ˈrɪɡbəʊn/

noun

dialect Scottish, British
  • The backbone; the spine. In early use also: †a vertebra (obsolete).

Origin

Late Middle English; earliest use found in Glossary of W. de Bibbesworth. From rig + bone.