noun. translucent brittle substance produced from pine oleoresin; used especially in varnishes and inks and on the bows of stringed instruments.
1. Noun, singular or mass Harvested pine resin is also known as rosin, pitch and colophony. 2. Adjective The European Union states that a colophony level of 0.1 percent or greater must be labeled and may pose as a skin contact sensitizer. 3. Verb, base form So, you have an allergy to colophony, what does that mean exactly?