名詞 rosin:

1. any of a class of solid or semisolid viscous substances obtained either as exudations from certain plants or prepared by polymerization of simple molecules
   同義詞：resin

動(dòng)詞 rosin:

1. rub rosin onto

ros.in

n.（名詞）
A translucent yellowish to dark brown resin derived from the stumps or sap of various pine trees and used to increase sliding friction, as on the bows of certain stringed instruments, and to manufacture a wide variety of products including varnishes, inks, linoleum, adhesives, and soldering compounds.
松香，松脂：一種從各種松樹的樹樁或樹液中提取的黃色至深棕色的半透明樹脂，用來增加某些絲弦樂器的琴弓上的滑動(dòng)摩擦力，也可用來制造涂料、油墨、亞麻油地氈、膠粘劑及焊接化合物等各種各樣的產(chǎn)品
v.tr.（及物動(dòng)詞）
ros.ined,ros.in.ing,ros.ins
To coat or rub with rosin.
用松香涂或擦

來源：
Middle English
中古英語
variant of resin * see resin
resin的變體 *參見 resin

【引伸】
ros.iny
adj.（形容詞）