rosin
noun/ˈrɒzɪn/
/ˈrɑːzn/
[uncountable]- a substance that a player uses on the bow of a musical instrument such as a violin so that it makes a better sound when it moves across the stringsWord OriginMiddle English: from medieval Latin rosina, from Latin resina; related to Greek rhētinē ‘pine resin’.
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rosin