Definitions

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

  • adj. Somewhat sharp or acid in character: subacid remarks.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Somewhat acidic.
  • n. Any substance that is moderately acid.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Moderately acid or sour.

from The Century Dictionary and Cyclopedia

  • Moderately acid or sour: as, a subacid juice.
  • Hence, noting words or a temperament verging on acidity or somewhat biting.
  • n. A substance moderately acid.

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

  • adj. slightly sour to the taste

Etymologies

sub- +‎ acid (Wiktionary)

Examples

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