ˌärkyəˈwā(ˌ)lē noun
( plural arcua·lia -_lēə)
Etymology: New Latin, from Latin arcus bow + -ale (neuter of -alis -al)
: any of the primitive cartilages or structural elements of which a typical vertebra is formed, there being four pairs, two dorsal and two ventral, usually combined with various dorsal and ventral accessory elements