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

Related Words for ru

glare, gape, pin, ogle, bore, admire, eye, moon, rubber, peek, inspect, regard, gawk, contemplate, observe, gloat, peer, peep, look, beam

Examples from the Web for ru

Contemporary Examples of ru

Historical Examples of ru

British Dictionary definitions for ru


the internet domain name for
  1. Russian Federation
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the chemical symbol for
  1. ruthenium
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abbreviation for
  1. Rugby Union
  2. Burundi (international car registration)
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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


  1. The symbol for the elementruthenium
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

ru in Science


  1. The symbol for ruthenium.
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  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.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.