Definitions for "Col legno"
(Ital. for "with the wood" of the bow) : hitting the strings with the wood, instead of the hair, of the bow. The effect is typically associated with the rattle of bones, largely by virtue of its early use in the last movement of Berlioz's Symphonie fantastique (GP 83).
Play with the stick of the bow
literary 'with wood", bouncing the back of the bow over the string of a string instrument