rather sour sharp or sour in speech, manner, etc; acid
WordReference Random House Learner's Dictionary of American English © 2025
a•cid•u•lous /əˈsɪdʒələs/USA pronunciation
adj.
WordReference Random House Unabridged Dictionary of American English © 2025- harsh;
biting:The prosecutor's acidulous remarks offended the jury.
a•cid•u•lous
(ə sij′ə ləs),USA pronunciation adj.
- slightly sour.
- sharp;
caustic:his acidulous criticism of the book. - moderately acid or tart;
subacid.
- Latin acidulus. See acid, -ulous
- 1760–70
Collins Concise English Dictionary © HarperCollins Publishers::
'acidulous' also found in these entries (note: many are not synonyms or translations):