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