incunabulum復數
Incunabulum \In`cu*nab"u*lum\, n.; pl. {Incunabula}. [L.
incunabula cradle, birthplace, origin. See 1st {In-}, and
{Cunabula}.]
A work of art or of human industry, of an early epoch;
especially, a book printed before a. d. 1500.