What does acidulous mean?
Acidulous is an adjective describing something that is slightly sour or tart, whether in actual taste or in figurative temper. Literally, it applies to flavors — an acidulous apple, an acidulous white wine — conveying a mild sharpness rather than outright acidity. More often, however, the word is used figuratively to characterize speech, writing, or demeanor that carries a subtle bite: an acidulous remark, an acidulous sense of humor, an acidulous critic. The figurative sense implies a measured, understated sharpness — cutting, but with restraint and often a degree of wit. The word derives from the Latin acidulus, a diminutive of acidus meaning 'slightly sour,' which itself gives English the word 'acid.' Because of its Latin pedigree and literary flavor, acidulous belongs to formal registers; it is at home in book reviews, essays, and gastronomic writing far more than in casual conversation. It offers writers a precise way to describe criticism that stings gently rather than wounds openly.
adjectiveSlightly sour or sharp in taste; by extension, somewhat bitter or cutting in manner, tone, or remark.
- Slightly sour or tart to the taste.
- (of speech, writing, or manner) Somewhat sharp, biting, or sarcastic.
"Her acidulous remarks about the committee's progress left several members stung."
"The wine had an acidulous edge that cut through the richness of the cheese."
"His acidulous critique of the proposal made it clear he had not been persuaded."
Acidulous is literally the diminutive of 'acid' in Latin — so when someone makes an acidulous comment, they're serving you a small, refined dose of sourness.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of acidulous
Acidulous comes from the Latin acidulus, a diminutive of acidus ('sour'), meaning 'somewhat sour.' It entered English in the early seventeenth century, initially in literal reference to taste before extending to temperament and expression. It shares its Latin root with 'acid' and related words such as 'acidify' and 'acidulate.'
Related word forms
How acidulous is actually used
Acidulous is a relatively formal, literary word. In literal use it often appears in descriptions of food and drink, especially wine. Figurative use typically characterizes remarks, tones, or personalities as mildly rather than savagely critical — it suggests a refined, understated sharpness rather than open hostility.
Easily confused with acidulous
Acidic describes a substance that is chemically acidic or strongly sour-tasting, while acidulous means only mildly or slightly sour, and is also used figuratively for a sharp or biting manner.