When the Oxford English Dictionary claims that rersawing is "the action of sawing again" it misleads. Instead, think of the operation as "slicing" wood -- usually with a bandsaw into thin pieces -- for veneering operations. Below are some historic uses of "resawing taken from the OED.
1611 FLORIO, Risegatione,
a resawing, a clipping.
1875 KNIGHT Dict. Mech. 1920/1
Resawing-machine, a machine for cutting up squared timber into small stuff or boards.
1881 FRANKLYN Glance at Australia 369
One of Fay's large re-sawing machines.