A definition of wire is just about the same as the definition for bar, in that wire can be almost any cross section, but, unlike bar, wire can be round. The major difference lies in the fact that the minor dimension for bar must be at least three-eighths of an inch (.375") while the major dimension for wire must be under three-eighths of an inch.
A long product form that is from 0.030 (0.76 mm) to 1/4 inch (6.35 mm) in diameter, in round, square, octagonal, or hexagonal cross-sections.
the wire mesh used at the wet end of the paper making process. The wire determines the textures of the paper.