• WordNet 3.6
    • adj acidulous being sour to the taste
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Webster's Revised Unabridged Dictionary
    • a Acidulous Slightly sour; sub-acid; sourish; as, an acidulous tincture.
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Century Dictionary and Cyclopedia
    • acidulous Slightly sour; subacid, as cream of tartar, oranges, gooseberries, etc.
    • acidulous Figuratively, sour in feeling or expression; sharp; caustic; harsh.
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Chambers's Twentieth Century Dictionary
    • adj Acidulous as-id′ū-lus slightly sour: subacid: containing carbonic acid, as mineral waters:
    • adj Acidulous as-id′ū-lus (fig.) caustic, sharp.
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Webster's Revised Unabridged Dictionary
L. acidulus, dim. of acidus,. See Acid
Chambers's Twentieth Century Dictionary
L. acidulus, dim. of acidus, sour. See Acid.


In literature:

The oil, which is acidulated, and which then powerfully reddens litmus paper, is decanted.
"American Handbook of the Daguerrotype" by Samuel D. Humphrey
Harry's father died, Harry became senior partner in the Bon Ton Store, and Juanita was more acidulous and shrewd and cackling than ever.
"Main Street" by Sinclair Lewis
No, I can't kiss you, because I've got an acidulated drop in my mouth.
"The Mystery of Edwin Drood" by Charles Dickens
But Amelie's previous acidulous remark about women who made their own dresses rankled in Lolotte's mind.
"Two Poets" by Honore de Balzac
Sudden, thunderous outpourings of acidulous and gluey fluid.
"After the Rain" by Sam Vaknin
Carded cotton-wool is placed in water, acidulated with 3 per cent.
"Scientific American Supplement, No. 286" by Various
Wild carrots sprang from its acidulous soil.
"Sheila of Big Wreck Cove" by James A. Cooper
The people of Ploid have in their possession a remarkable line of fertilizers, not in the form of ground bones, but acidulous juices.
"Life in a Thousand Worlds" by William Shuler Harris
Water, acidulated with sulphuric acid.
"Experimental Researches in Electricity, Volume 1" by Michael Faraday
How he hated the entry of the acidulated tragic into all their talks.
"Balloons" by Elizabeth Bibesco

In news:

Blanch beets in acidulated water until cooked through.

In science:

The reaction of these with ferrous iron in the acidulous Hadean ocean (derived from very hot springs, Russell and Hall 2006) is seen as having drawn a secondary ocean current with the Fe2+ toward the alkaline spring as a result of entrainment (Martin et al 2008).
Magnetism, FeS colloids, and Origins of Life