The Collaborative International Dictionary of English v.0.48:
fretsaw \fretsaw\ n. A narrow-bladed fine-toothed saw for cutting curved outlines. Syn: jigsaw, scroll saw. [WordNet 1.5]WordNet (r) 3.0 (2006):
fretsaw n 1: fine-toothed power saw with a narrow blade; used to cut curved outlines [syn: jigsaw, scroll saw, fretsaw]