gabion

1. (historical, military) A cylindrical basket or cage of wicker which was filled with earth or stones and used in fortifications and other engineering work (a precursor to the sandbag).Examples: "When our artillery came before the walls of the town, the English within the walls killed some of our men, and several pioneers who were making gabions. And seeing they were so wounded that there was no hope of curing them, their comrades stripped them, and put them still living inside the gabions, which served to fill them up."; "Then ſe the bringing of our ordinance / Along the trench into the battery, / VVhere vve vvil haue gabions of ſix foot broad / To ſaue our Cannoniers from muſket ſhot, […]"historical

2. (civil engineering) A porous metal cylinder filled with stones and used in a variety of civil engineering contexts, especially in the construction of retaining walls, the reinforcing of steep slopes, or in the prevention of erosion in river banks.