/ir'i doz"min, -dos"-, uy'ri-/ , n.
a native alloy of iridium and osmium, usually containing some rhodium, ruthenium, platinum, etc., used esp. for the points of gold pens.
Also, iridosmium /ir'i doz"mee euhm, -dos"-, uy'ri-/ . Also called osmiridium .
[ 1820-30; IRID- + OSM(IUM) + -INE 2 ]