General Science


  • A silver-white or gray metallic chemical element whose atomic number is 75. Among the elements, its melting point is exceeded only by carbon and tungsten, and its density is greater than all but iridium, osmium, and platinum. It has over 30 known isotopes, of which one is stable. It has various applications in electronics, including its use in filaments, contacts, high-temperature thermocouples, flashbulbs, electroplating, semiconductors, and superconductors. Its chemical symbol is Re.
  • chemical symbolRe

Information & Library Science

  • prefix used with verbs and nouns to indicate repetition
  • preposition used in business English to refer to something which is to be discussed