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[uh-sij-uh-luh s] /əˈsɪdʒ ə ləs/
slightly sour.
sharp; caustic:
his acidulous criticism of the book.
moderately acid or tart; subacid.
Also, acidulent.
Origin of acidulous
From the Latin word acidulus, dating back to 1760-70. See acid, -ulous
Related forms
subacidulous, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for acidulous
Historical Examples
  • 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.

  • She had no acidulous interest in puncturing sham for the sake of puncturing it.

  • "One would think the first Set were likely to be the best Judges," he adds with acidulous brevity.

  • There was an acidulous resentment in the tone of her answer that indicated that she wanted her husband to send me away.

    Tramping on Life Harry Kemp
  • His gentle drawl was a capital foil to Lady Georgina's acidulous soprano.

  • He bought a bottle of some acidulous drink just off the ice and refreshed himself with it, drinking from the bottle's mouth.

    Gigolo Edna Ferber
British Dictionary definitions for acidulous


rather sour
sharp or sour in speech, manner, etc; acid
Word Origin
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
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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.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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acidulous in Medicine

acidulous a·cid·u·lous (ə-sĭj'ə-ləs)
Slightly acid or sour.

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