- Chemistry. the yellowish to amber, translucent, hard, brittle, fragmented resin left after distilling the oil of turpentine from the crude oleoresin of the pine: used chiefly in making varnishes, varnish and paint driers, printing inks, and for rubbing on the bows of such string instruments as the violin.
- to cover or rub with rosin.
Origin of rosin
1300–50; Middle English < Old French, variant of resine resin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for rosin
“Hell, get out of the way,” one researcher, a biologist who conducted early gender-selection studies, tells Rosin.
To show how it all plays out, Rosin spent many months reporting—and, indeed, The End of Men is rigorously researched.
Rosin says her goal is to help men and women learn to navigate these changes, not draw battle lines based on gender.
But Rosin was perhaps the first to string all the economic realities together in such staggering form.
The rosin melts and spreads over the leaf, varnishing it beautifully.
Then take them out, dry the bottles, rosin down the corks close, and set them in dry saw-dust with their necks downward.
A process of Rosin's, not yet published, is more convenient.Histology of the Blood
In the pit was a quantity of rosin sufficient to fill a thousand barrels.Among the Pines
James R. Gilmore
First melt the beeswax and rosin, being careful not to have the fire too hot.Walnut Growing in Oregon
- Also called: colophony a translucent brittle amber substance produced in the distillation of crude turpentine oleoresin and used esp in making varnishes, printing inks, and sealing waxes and for treating the bows of stringed instruments
- (not in technical usage) another name for resin (def. 1)
- (tr) to treat or coat with rosin
C14: variant of resin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for rosin
late 13c., from Old French raisine, rousine, variants of résine (see resin). The verb is from mid- 14c. Related: Rosined; rosining.
Online Etymology Dictionary, © 2010 Douglas Harper
- A translucent yellowish to dark brown resin derived from the stumps or sap of various pine trees and used as an adhesive in plasters and as a stimulant in ointments.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.