Origin of backsaw
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for backsaw
Cut all the tenons with a backsaw and smooth them with a chisel.
If they do not, saw in the joints with a backsaw until they do fit.The Boy Mechanic, Book 2
Mark the tenons on the ends of the stretcher and cut them with a backsaw and make smooth with a chisel.