kumbecephalic, kumbo-kephalic bad forms of cymbocephalic. 1863D. Wilson Preh.Ann. I. 236, I suggested the term kumbecephalic, a boat-shaped,..for this form of skull.1866Laing Prehist. Rem. Caithn. 64 The kumbo-kephalic, which so many of the best authorities believe to be the primitive British type.