headshield

plural headshields

1. A helmet or similar covering that protects the head.

   Two new molded fiber-glass plastic headshields for weldors are reported to offer the user lighter weight comfort with complete head protection from the welding arc and spatter.

   1955, The Welding Engineer, volume 40, page 50

2. A cephalon of a trilobite.

   Trilobites have a distinct headshield or cephalon and a distinct tailshield or pygidium, and in both these regions the original segmentation has been suppressed — more completely in the cephalon than in the pygidium — and [...]

   1985, E. W. Nield, Ted Nield, V. C. T. Tucker, Palaeontology, an Introduction