from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A mineral that is a natural alloy of osmium and iridium with small inclusions of platinum, rhodium, and other metals, used in needles and wearing points. Also called iridosmine.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A hard, corrosion-resistant alloy or osmium and iridium used in pen nibs
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.
osm(ium) + iridium.(American Heritage® Dictionary of the English Language, Fourth Edition)