Lús

According to the Old English Dictionary:

lús

f. A louse :-- Lús pediculus vel sexpes, Wrt. Voc. 24, 11. Swínes lús usia, 24, 34. Luus peducla, ii. 117, 8. Hine byton lýs, Hexam. 17; Norm. 24, 30. Hé áfylde eal heora land mid froggon, and siððan mid gnættum, eft mid hundes lúsum, Homl. Th. ii. 192, 21. [Icel. lús: f; pl. lýss: O. H. Ger. lús pediculus: Ger. laus.] lus