acidulous

[uh-sij-uh-luhs]
adjective
1.
slightly sour.
2.
sharp; caustic: his acidulous criticism of the book.
3.
moderately acid or tart; subacid.
Also, acidulent.


Origin:
1760–70; < Latin acidulus. See acid, -ulous

subacidulous, adjective
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World English Dictionary
acidulous or acidulent (əˈsɪdjʊləs)
 
adj
1.  rather sour
2.  sharp or sour in speech, manner, etc; acid
 
[C18: from Latin acidulus sourish, diminutive of acidus sour]
 
acidulent or acidulent
 
adj
 
[C18: from Latin acidulus sourish, diminutive of acidus sour]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

acidulous
1769, "sub-acidic," used figuratively for "sour-tempered;" from L. acidulus "slightly sour," a dim. of acidus (see acid).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

acidulous a·cid·u·lous (ə-sĭj'ə-ləs)
adj.
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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Example sentences
Spacey, after a long career of playing acidulous bad guys, gives a performance of surprising gentleness.
Invective-hilarious, acidulous invective, often served up with false apologies-is everywhere.
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