Meaning

noun any of a class of solid or semisolid viscous substances obtained either as exudations from certain plants or prepared by polymerization of simple molecules

verb rub rosin onto

origin* As a German surname, from the noun Rosine (“raisin”). Also Germanized/Americanized from Slavic forms of this word such as Slovene rozina, Lower Sorbian rozyna, themselves borrowed from the German. * As an Italian surname, variant of Rosino, pet form of Roso, itself from both Rosa and Rosso. * As a French surname, pet form or variant of Rose. * As a Serbo-Croatian surname (Rošin), from a variant…

Etymology from Wiktionary, CC BY-SA 3.0