Þri-snæcce
Bosworth & Toller Anglo-Saxon Old English Dictionary - þri-snæcce
According to the Old English Dictionary:
-snæce, -snece;
- þri-snæcce
- adj. Three-pointed, cloven in three :-- Þrysnece (-suæcce, -snæce) tungan hæfþ seó næddre trisulcam linguam habet serpens, Ælfc. Gr. 49; Zup. 288, 12.