Mylen-troh
Bosworth & Toller Anglo-Saxon Old English Dictionary - mylen-troh
According to the Old English Dictionary:
-trog, es;
- mylen-troh
- n. A mill-trough, the channel in which wafer comes to a mill-wheel :-- Mylentroh canalis, Wrt. Voc. ii. 128, 16. mylen-troh