In the history of printing, an incunable or incunabulum (plural incunables or incunabula, respectively) is a book, pamphlet, or broadside that was printed in the earliest stages of printing in Europe, up to the year 1500. Incunabula were produced before the printing press became widespread on the continent and are distinct from manuscripts, which are documents written by hand. Some authorities include block books from the same time period as incunabula, whereas others limit the term to works printed using movable type.
there are about 30,000 distinct incunable editions known. The probable number of surviving individual copies is much higher, estimated at around 125,000 in Germany alone. Through statistical analysis, it is estimated that the number of lost editions is at least 20,000. Around 550,000 copies of around 27,500 different works have been preserved worldwide.
Incunable is the anglicised form of incunabulum, reconstructed singular of Latin incunabula, which meant "swaddling clothes", or "cradle", which could metaphorically refer to "the earliest stages or first traces in the development". A former term for incunable is fifteener, meaning "fifteenth-century edition".
The term incunabula was first used in the context of printing by the Dutch physician and humanist Hadrianus Junius (Adriaen de Jonghe, 1511–1575), in a passage in his work Batavia (written in 1569; published posthumously in 1588). He referred to a period "inter prima artis [typographicae] incunabula" ("in the first infancy of the typographic art"). The term has sometimes been incorrectly attributed to Bernhard von Mallinckrodt (1591–1664), in his Latin pamphlet De ortu ac progressu artis typographicae ("On the rise and progress of the typographic art"; 1640), but he was quoting Junius.
The term incunabula came to denote printed books themselves in the late 17th century. It is not found in English before the mid-19th century.
Junius set an end-date of 1500 to his era of incunabula, which remains the convention in modern bibliographical scholarship.