• WordNet 3.6
    • v acidulate make sour or more sour
    • ***
Webster's Revised Unabridged Dictionary
    • v. t Acidulate To make sour or acid in a moderate degree; to sour somewhat.
    • ***
Century Dictionary and Cyclopedia
    • acidulate To tincture with an acid; render somewhat acid or sourish.
    • acidulate Figuratively, to sour, as the mind; embitter; make cross or captious.
    • ***
Chambers's Twentieth Century Dictionary
    • v.t Acidulate to make slightly acid
    • ***


Webster's Revised Unabridged Dictionary
Cf. F. aciduler,. See Acidulous
Chambers's Twentieth Century Dictionary
L. ac-ēre, to be sour—root ak, sharp.


In literature:

The wash water is sufficiently acidulated by the addition of two or three drops of acid per litre.
"On Laboratory Arts" by Richard Threlfall
He buys on the market the acidulated bone or rock, just as a manufacturer makes his purchase.
"Crops and Methods for Soil Improvement" by Alva Agee
It is thus burnt when acidulated water is poured over it; it is also thus burnt in the voltaic battery.
"Fragments of science, V. 1-2" by John Tyndall
All acids disagree with me, and your acidulated observations are giving me unpleasant premonitory symptoms.
"Fairy Fingers" by Anna Cora Mowatt Ritchie
One sort bears in rich profusion a number of brilliant scarlet, highly perfumed, and acidulous fruits.
"The Western World" by W.H.G. Kingston
An acidulous smile played around his mouth, his white beard quivered when he dropped the corners of his lips in satanic glee.
"The Goose Man" by Jacob Wassermann
Just before serving acidulate.
"The Khaki Kook Book" by Mary Kennedy Core
One of these was covered with brown fruit, with whitish insides, which had a rather nice acidulated taste.
"Adventures of a Young Naturalist" by Lucien Biart
Drain off the water and immerse tubes in a large jar containing water acidulated with 2 to 5 per cent.
"The Elements of Bacteriological Technique" by John William Henry Eyre
Sour drops, acidulated drinks, and all articles of food that "set the teeth on edge," are injurious, and should be carefully avoided.
"Popular Education" by Ira Mayhew

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