noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A hard, corrosion-resistant alloy of osmium and iridium, used in pen nibs. countable, uncountable
2. 2
   a hard and corrosion resistant mineral that is a natural alloy of osmium and iridium (usually containing small amounts of rhodium and platinum); used in needles and pen nibs etc. wordnet

Synonyms

All synonyms

iridosmine

Etymology

Blend of osmium + iridium.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.