Definition of "acidulous" []

• Slightly sour in taste or in manner. See Synonyms at sour. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "He wanted to cancel the project — unless I was willing to expand my introduction, incorporating some of the acidulous commentary into a calmer treatment of the matter."
• "Every member of the cast shines at varying intensities: Ms. McAdams as a young almost-married who's lively and attractive, albeit a scold; Kurt Fuller as Inez's acidulous father; Mimi Kennedy as her dryly sarcastic mother; and, in lesser roles, Nina Arianda, Tom Hiddleston, Daniel Lundh and Michel Vuillermoz."
• "His observations range from the cheerful to the acidulous but are never malicious."