Available Definitions:
1) n. - The upper lip or helmet-shaped part of a labiate flower.
2) n. - A kind of bandage for the head.
3) n. - Headache extending all over the head.
4) n. - A genus of fossil echini, having a vaulted, helmet-shaped shell.
5) n. - The anterior, outer process of the second joint of the maxillae in certain insects.