Definition: The associative property states that you can add or multiply regardless of how the numbers are grouped. By 'grouped' we mean 'how you use parenthesis'. In other words, if you are adding or multiplying it does not matter where you put the parenthesis.
Full Definition of ROSIN. : a translucent amber-colored to almost black brittle friable resin that is obtained from the oleoresin or deadwood of pine trees or from tall oil and used especially in making varnish.
Characteristics of Rosin. 1  Soft vs. Hard - Softer rosins are stickier and offer more grab on the string. They also tend to produce a stronger, grittier tone. Harder rosins glide more smoothly over the strings, offer less bite and a smoother, more polished, feel and sound.