Webster’s Revised Unabridged Dictionary · 1913
Decameron
De·cam′e·ron (dē·kăm′ē·rŏn), n. [It. decamerone, fr. Gr. δέκα ten + μέρος part; though quite generally supposed to be derived from ἡμέρα day: cf. F. décaméron.] A celebrated collection of tales, supposed to be related in ten days; — written in the 14th century, by Boccaccio, an Italian.