verb (used with object), a·cid·u·lat·ed, a·cid·u·lat·ing.
Examples from the Web for acidulate
Acidulate the filtered fluid slightly with hydrochloric acid, evaporate it to the bulk of 1⁄2 an ounce, and let it cool.Cooley's Practical Receipts, Volume II|Arnold Cooley
A cup of roselle juice diluted is better to acidulate with than the lemon juice.
If tomatoes are not used, acidulate a combination of tomatoes, eggplant, and peppers.