Ma'anar ƙamus na roba nau'in roba nau'in roba ne da ake samar da shi ta hanyar haɗakar sinadarai, maimakon an samo shi daga tushen halitta kamar latex na bishiyoyin roba. Robar roba ana yin ta ne daga polymers daban-daban da sauran sinadarai, kuma ana iya keɓance su don samun takamaiman kaddarorin kamar karko, elasticity, da juriya ga zafi, sinadarai, da yanayin yanayi. Ana amfani da shi a cikin aikace-aikace iri-iri da suka haɗa da taya, hoses, belts, seals, gaskets, da kuma samar da manne, sutura, da sauran kayayyaki.