Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. See osmiridium.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A native compound of iridium and osmium.

from the GNU version of the Collaborative International Dictionary of English

  • n. The native compound of iridium and osmium. It is found in flattened metallic grains of extreme hardness, and is often used for pointing gold pens.

from The Century Dictionary and Cyclopedia

  • n. Same as iridosmium.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. 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.

Etymologies

irid(o)- + osm(ium) + -ine2.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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