seasca1, num. s. & a. Sixty. 1. m. (gs. ~d, pl. ~idí). ~ a dó, sixty-two. Céad ~ a cúig, one hundred and sixty-five. Trí bliana ~d, trí bliana is ~, sixty-three years. Sna ~idí, in the sixties. 2. (Followed by nom. sg.) ~ duine, rud, sixty persons, things.