Sentence:  That is , when Mr. Milstein thrust straight to the core of the music , sparks flying , bow shredding , <WSD>violin</WSD> singing , glittering and sometimes spitting , Mr. Hendl could go along . 
Meaning of the word marked with <WSD> tags:  bowed stringed instrument that is the highest member of the violin family; this instrument has four strings and a hollow body and an unfretted fingerboard and is played with a bow