1. A translucent yellowish to dark brown resin derived from the stumps or sap of various pine trees and used to increase sliding friction, as on the bows of certain stringed instruments, and to manufacture a wide variety of products including varnishes, inks, linoleum, adhesives, and soldering compounds.
2. to coat or rub with rosin.

1. A solid form of resin, obtained from liquid resin by vaporizing its volatile components.
2. resin
3. to apply rosin to something.

1. the hard, amber-colored resin left after distilling off the volatile oil of turpentine; colophony.
2. to rub with rosin, as musicians rub the bow of a violin.

1. to cover or rub with rosin.
2. same as resin.
3. specifically resin as employed in a solid state for ordinary purposes.

1. any of a class of solid or semisolid viscous substances obtained either as exudations from certain plants or prepared by polymerization of simple molecules
2. rub rosin onto