diapophysis

noun

di·​apoph·​y·​sis ˌdī-ə-ˈpäf-ə-səs 

plural diapophyses -ˌsēz 

: a transverse process of a vertebra that is an outgrowth of the neural arch on the dorsal side

especially : one of the dorsal pair of such processes when two or more pairs are present