Osmiridium

Japanese: osmiridium
Osmiridium

…a naturally occurring mixture of platinum group elements, also called osmiridium. It is extremely hard and corrosion-resistant, so it was used to attach to the tip of a fountain pen.

*Some of the terminology explanations that mention "osmiridium" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…天然に産出する白金族元素の混合物で,オスミリジウムosmiridiumとも呼ばれる。きわめて硬く,耐食性がすぐれているので,万年筆のペンの先端につけて使用された。…

※「osmiridium」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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