Wiktionary
n. (''also'' '''saw''') A musical instrument consisting of a thin sheet of metal, or sometimes a saw, usually played with a bow.
Wikipedia
A musical saw, also called a singing saw, is a hand saw used as a musical instrument. Capable of continuous glissando ( portamento), the sound creates an ethereal tone, very similar to the theremin. The musical saw is classified as a friction idiophone with direct friction (131.22) under the Hornbostel-Sachs system of musical instrument classification.
Usage examples of "musical saw".
Having decided how much money we had to spend, we passed two happy hours figuring out whom we could get for it -- Monsieur Strummo, who plays the piano with his hands and feet, and who wants $5000 to do it for an hour and a half, or Signor Thumbo, who plays the musical saw all night for $25.
The nearest thing to it Harry had ever heard was the ghost orchestra at Nearly Headless Nick's deathday party, who had all been playing the musical saw.
Take a look at that picture again, and let's just say she doesn't sing and she doesn't dance, and she isn't an actress, nor does she entertain with Aloha and other requests on her musical saw.
His voice sounded almost like a musical saw, reaching a vocal weirdness that neither Reece nor Stroup nor Heacox had ever before heard in their lives, not even in the jungles of Cambodia.