Digger \Dig"ger\, n. One who, or that which, digs.
Digger wasp (Zo["o]l.), any one of the fossorial Hymenoptera.
Source: Webster's Revised Unabridged Dictionary (1913)
Diggers \Dig"gers\, n. pl.; sing. Digger. (Ethnol.) A degraded tribe of California Indians; -- so called from their practice of digging roots for food.