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Latin. n. Helmet.

 - n. (Bot.) The upper lip or helmet-shaped part of a labiate flower. (Surg.) A kind of bandage for the head. (Pathol.) Headache extending all over the head. (Paleon.) A genus of fossil echini, having a vaulted, helmet-shaped shell. (Zool.) The anterior, outer process of the second joint of the maxillae in certain insects.