from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An unusable or unwanted substance or material produced during or as a result of a process, such as metabolism or manufacturing.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. an unwanted material produced during some manufacturing process, especially radioactive material from nuclear reactors
  • n. the unwanted results of metabolism, expelled in the urine and faeces

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. any materials unused and rejected as worthless or unwanted


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