noun
synthetic rubber
Refers to artificially produced rubber, as opposed to natural rubber (天然ゴム). Used in technical and everyday contexts.
このタイヤは合成ゴムでできている。
This tire is made of synthetic rubber.
天然ゴム is natural rubber, while 合成ゴム is synthetic rubber.
Compound of 合成 (synthesis) and ゴム (rubber, from Dutch gom).