"jigsaw" in the noun sense
1. saber saw, jigsaw, reciprocating saw
a portable power saw with a reciprocating blade can be used with a variety of blades depending on the application and kind of cut generally have a plate that rides on the surface that is being cut
2. jigsaw, scroll saw, fretsaw
fine-toothed power saw with a narrow blade used to cut curved outlines
Source: WordNet® (An amazing lexical database of English)
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