Definition of "rhodium" [rho•di•um]

• A hard, durable, silvery-white metallic element that is used to form high-temperature alloys with platinum and is plated on other metals to produce a durable corrosion-resistant coating. Atomic number 45; atomic weight 102.905; melting point 1,966°C; boiling point 3,727°C; specific gravity 12.41; valence 2, 3, 4, 5, 6. See Table at element. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "This group includes the well-known Platinum and the relatively obscure metals called rhodium, iridium, ruthenium and osmium."
• "They're made of rhodium, which is an alloy of platinum. ""
• "This is usually achieved by electroplating the jewelry with rhodium."