Webster's Revised Unabridged Dictionary · 1913

Decameron

Decameron , noun

[Italian decamerone, from Greek de`ka ten + me`ros part; though quite generally supposed to be derived from "hme`ra day: compare French décaméron.]

A celebrated collection of tales, supposed to be related in ten days; -- written in the 14th century, by Boccaccio, an Italian.