incunabulum
/ˌɪnkjʊˈnæbjʊləm/(亦作incunable /ɪnˈkjuːnəbl/)
noun
(pl. incunabula /-lə/)
1- an early printed book, especially one printed before 1501（尤指1501年之前印刷的）古版书。
1.1
incunabula
archaic the early stages of the development of something〈古〉早期, 初期, 摇篮期。
词源
early 19th cent.: from Latin incunabula (neuter plural) 'swaddling clothes， cradle'， from in- 'into' + cunae 'cradle'.