Ides

(īdz.) [From Etruscan idus, I separate.] (Calendar.) Among the Romans, 8 days in each month of their calendar. They began on the 15th March, May, July, and Oct.; and on the 13th of the remaining months. The 1., like the kalends and nones, were always reckoned retrogre ively; thus they said VIII. Idus, the 8th month before the I. [s. 476]