Lewis & Short

1. cŏrōnis, ĭdis, f., = κορωνίς, a curved line or flourish formed with a pen, which writers or transcribers were accustomed to make at the end of a book or chapter; hence, as in Gr. (cf. Lidd. and Scott, under κορωνίς), for the end: serā coronide longus, * Mart. 10, 1, 1.