Definition of rosin
(Entry 1 of 2)
: 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
rosin
verbDefinition of rosin (Entry 2 of 2)
: to rub or treat (something, such as the bow of a violin) with rosin
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Merriam-Webster unabridged
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Time Traveler for rosin
The first known use of rosin was in the 13th century
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