ブナ

noun

Buna; brand-name synthetic rubber

Refers to a type of synthetic rubber originally developed by IG Farben; used in industrial and historical contexts.

• ブナはかつてドイツで開かい発はつされた合ごう成せいゴムの一いっ種しゅです。

  Buna is a type of synthetic rubber once developed in Germany.