Here-býme
Bosworth & Toller Anglo-Saxon Old English Dictionary - here-býme
According to the Old English Dictionary:
an;
- here-býme
- f. A war-trumpet, Cd. 147; Th. 183, 29; Exod. 99. [Cf. Icel. her-horn, her-luðr a trumpet: O. H. Ger. heri-, her-horn classicum, tuba.] here-byme