editio princeps

 
Pronunciation: /ɪˌdɪʃɪəʊ ˈprɪnsɛps/

noun (plural editiones principes /ɪˌdɪʃɪˌəʊniːz ˈprɪnsɪpiːz/)

  • the first printed edition of a book.

Origin:

Latin, from editio(n-) 'edition' and princeps 'chief, leader' (from primus 'first')