Dictionary
a•cid•u•lous
Pronunciation: (u-sij'u-lus), [key]—
adj.
1. slightly sour.
2. sharp; caustic:
his acidulous criticism of the book.
3. moderately acid or tart; subacid.
Also,acidulent.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.