'Colophony' definitions:

Definition of 'colophony'

noun

Translucent brittle substance produced from pine oleoresin; used especially in varnishes and inks and on the bows of stringed instruments

From: GCIDE

Colophony \Col"o*pho`ny\ (k[o^]l"[-o]*f[=o]*n[y^] or k[-o]*l[o^]f"[-o]*n[y^]; 277), n. [Gr. 'h kolofwni`a (sc. "rhti`nh resin, gum) resin, fr. Kolofw`nios of or from Colophon in Ionia.] Rosin. [1913 Webster]