A saw that is reinforced by a metal band along its back edge.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "backsaw" in a sentence
"Cut all the tenons with a backsaw and smooth them with a chisel."
"Mark the tenons on the ends of the stretcher and cut them with a backsaw and make smooth with a chisel."