noun
1. : a terrestrial isopod crustacean (suborder Oniscoidea) that has a flattened elliptical body often capable of being rolled into a ball and seven pairs of walking legs, is commonly dull brown or gray, usually lives under stones or bark, and may damage the roots of young trees — called also pill bug, slater, sow bug ; compare sea louse
2. : any of several small wingless insects of the order Corrodentia that live under bark, in the crevices of walls, and among old books and papers — compare book louse , deathwatch
3. : termite