A small square block or projection in cornices, a number of which are ranged in an ornamental band; – used particularly in the Ionic, Corinthian, and Composite orders.
Webster 1828 Edition
Dentil
DENTIL
,
Noun.
[L. A tooth.] In architecture, an ornament in cornices bearing some resemblance to teeth; used particularly in the Ionic and Corinthian order.