[ ree-nee-uhm ]
/ ˈri ni əm /
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a rare metallic element of the manganese subgroup: used, because of its high melting point, in platinum-rhenium thermocouples. Symbol: Re; atomic number: 75; atomic weight: 186.2.
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Words nearby rhenium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
British Dictionary definitions for rhenium
/ (ˈriːnɪəm) /
a dense silvery-white metallic element that has a high melting point. It occurs principally in gadolinite and molybdenite and is used, alloyed with tungsten or molybdenum, in high-temperature thermocouples. Symbol: Re; atomic no: 75; atomic wt: 186.207; valency: –1 or 1–7; relative density: 21.02; melting pt: 3186°C; boiling pt: 5596°C (est)
Word Origin for rhenium
C19: New Latin, from Rhēnus the Rhine
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
Medical definitions for rhenium
[ rē′nē-əm ]
n. Symbol Re
A rare dense metallic element with a high melting point, used in plating medical instruments. Atomic number 75.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Scientific definitions for rhenium
[ rē′nē-əm ]
A very rare, dense, silvery-white metallic element with a very high melting point. It is used to make catalysts and electrical contacts. Atomic number 75; atomic weight 186.2; melting point 3,180°C; boiling point 5,627°C; specific gravity 21.02; valence 1, 2, 3, 4, 5, 6, 7. See Periodic Table.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.