Mearc-ísern
Bosworth & Toller Anglo-Saxon Old English Dictionary - mearc-ísern
According to the Old English Dictionary:
es;
- mearc-ísern
- n. A branding-iron :-- Mearcísern cauterium, Ep. Gl. 8 d, 35: Wrt. Voc. ii. 129, 76: ferrum quo note pecudibus inuruntur, 3. Mercíseren, 102, 58. mearc-isern