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Ru

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Symbol, Chemistry.
  1. ruthenium.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for ru

ru

the internet domain name for
  1. Russian Federation

Ru

the chemical symbol for
  1. ruthenium

RU

abbreviation for
  1. Rugby Union
  2. Burundi (international car registration)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

ru in Medicine

Ru

  1. The symbol for the elementruthenium

ru in Science

Ru

  1. The symbol for ruthenium.

ruthenium

[rōō-thēnē-əm]
Ru
  1. A rare, silvery-gray metallic element that is hard, brittle, and very resistant to corrosion. It is used to harden alloys of platinum and palladium for jewelry and electrical contacts. Atomic number 44; atomic weight 101.07; melting point 2,310°C; boiling point 3,900°C; specific gravity 12.41; valence 0, 1, 2, 3, 4, 5, 6, 7, 8. See Periodic Table.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.