A gabion is a welded wire basket or cage filled with earth or rocks. It is typically used to build a support or abutment.From Wikipedia: Gabion (from Italian gabbione meaning big cage; from Italian gabbia and Latin cavea meaning cage) are cages, cylinders, or boxes filled with soil or sand that are used in civil engineering, road building, and military applications.rom Wikipedia: Gabion (from Italian gabbione meaning big cage; from Italian gabbia and Latin cavea meaning cage) are cages, cylinders, or boxes filled with soil or sand that are used in civil engineering, road building, and military applications.
Subject:Chemistry. Books in this subject area deal with chemistry: the science concerned with the composition, structure, and properties of matter, as well as the changes it undergoes during chemical reactions.
1 Chemistry is the study of matter and its properties.  Sub-domains of chemistry include: analytical chemistry, biochemistry, inorganic chemistry, organic chemistry, physical chemistry, and biophysical chemistry.