from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A rare, dense, silvery-white metallic element with a very high melting point used for electrical contacts and with tungsten for high-temperature thermocouples. 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 Table at element.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A metallic chemical element (symbol Re) with an atomic number of 75.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum
From Latin Rhēnus, the Rhine.(American Heritage® Dictionary of the English Language, Fourth Edition)
Latin Rhenus, Rhine (Wiktionary)