• synonyms


[uh-sij-uh-luh s]
See more synonyms for acidulous on Thesaurus.com
  1. slightly sour.
  2. sharp; caustic: his acidulous criticism of the book.
  3. moderately acid or tart; subacid.
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Also acidulent.

Origin of acidulous

From the Latin word acidulus, dating back to 1760–70. See acid, -ulous
Related formssub·a·cid·u·lous, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for acidulous

acerbic, dry, piquant, sharp, tart, acerb, biting, cutting, mocking, sarcastic, ironical

Examples from the Web for acidulous

Historical Examples of acidulous

  • She is an acidulous maiden person with ultra-ritualistic tendencies.

    The Spenders

    Harry Leon Wilson

  • She might marry or might miss, or grow into an acidulous red-headed woman.

    The Wind Bloweth

    Brian Oswald Donn-Byrne

  • Sudden, thunderous outpourings of acidulous and gluey fluid.

    After the Rain

    Sam Vaknin

  • Fragrant; golden yellow; tastes oily, acidulous, and resinous.

  • The product is yellowish and acidulous, from the presence of acetic acid.

British Dictionary definitions for acidulous



  1. rather sour
  2. sharp or sour in speech, manner, etc; acid
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Word Origin for acidulous

C18: from Latin acidulus sourish, diminutive of acidus sour
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for acidulous


1769, "sub-acidic," used figuratively for "sour-tempered;" from Latin acidulus "slightly sour," a diminutive of acidus (see acid (adj.)).

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Online Etymology Dictionary, © 2010 Douglas Harper

acidulous in Medicine


  1. Slightly acid or sour.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.