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

  • n. Any of various acids containing the peroxy group.
  • n. An inorganic acid, such as perchloric acid, containing the largest proportion of oxygen in a series of related acids.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any acid that contains a peroxy group - e.g. peracetic acid
  • n. The oxyacid of a particular element that has the largest number of oxygen atoms - e.g. perchloric acid

from The Century Dictionary and Cyclopedia

  • n. An acid containing more than the usual amount of oxygen, as acetperacid (CH3CO2.OH), and benzoperacid (C6H5.C02.OH). Many of the peracids are extremely powerful germicides.


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