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

  • transitive v. To make or become slightly acid.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. To make something slightly, or moderately acid; to acidify
  • v. To make sour in a moderate degree; to sour somewhat
  • v. To use an acidic catalyst. The chemical change being emphasised over the importance of the change in ph. Used in the processing of biodiesel co-products.

from the GNU version of the Collaborative International Dictionary of English

  • transitive v. To make sour or acid in a moderate degree; to sour somewhat.

from The Century Dictionary and Cyclopedia

  • To tincture with an acid; render somewhat acid or sourish.
  • Figuratively, to sour, as the mind; embitter; make cross or captious.

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

  • v. make sour or more sour


acidul(ous) + -ate1.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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