Backsaw

from WordNet (r) 3.0 (2006)

backsaw
    n 1: a handsaw that is stiffened by metal reinforcement along
         the upper edge [syn: {backsaw}, {back saw}]

from The Collaborative International Dictionary of English v.0.48

Backsaw \Back"saw`\ (b[a^]k"s[add]`), n. [2d back, n. + saw.]
   A saw (as a tenon saw) whose blade is stiffened by an added
   metallic back.
   [1913 Webster]