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13 points
IRIDOSMINE is validvalid
[n IRIDOSMINES]
a very hard corrosion-resistant white or grey natural alloy of osmium and iridium used esp. in pen nibs, also IRIDOSMIUM, OSMIRIDIUM [n -S]
[n IRIDOSMINES]
a very hard corrosion-resistant white or grey natural alloy of osmium and iridium used esp. in pen nibs, also IRIDOSMIUM, OSMIRIDIUM [n -S]