a. (Bot.) Having the margin dentate and also ciliate or fringed with hairs. [ 1913 Webster ]
adv. In a dentate or toothed manner;
a. (Bot.) Having a form intermediate between dentate and sinuate. [ 1913 Webster ]
n. Formation of teeth; toothed form. [ R. ] [ 1913 Webster ]
How did it [ a bill ] get its barb, its dentation? Paley. [ 1913 Webster ]