ammoniac

noun
am·​mo·​ni·​ac | \ ə-ˈmō-nē-ˌak How to pronounce ammoniac (audio) \

Definition of ammoniac

: the aromatic gum resin of a southwest Asian herb (Dorema ammoniacum) of the carrot family used as an expectorant and stimulant and in plasters

First Known Use of ammoniac

15th century, in the meaning defined above

History and Etymology for ammoniac

Middle English & Latin; Middle English, from Latin ammoniacum, from Greek ammōniakon, from neuter of ammōniakos of Ammon

Learn More About ammoniac

Time Traveler for ammoniac

Time Traveler

The first known use of ammoniac was in the 15th century

See more words from the same century

Dictionary Entries Near ammoniac

ammonia

ammoniac

ammoniacal

See More Nearby Entries 

Statistics for ammoniac

Cite this Entry

“Ammoniac.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ammoniac. Accessed 25 Sep. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for ammoniac

ammoniac

noun
am·​mo·​ni·​ac | \ ə-ˈmō-nē-ˌak How to pronounce ammoniac (audio) \

Medical Definition of ammoniac

 (Entry 1 of 2)

: the aromatic gum resin of a Persian herb (Dorema ammoniacum) of the carrot family used as an expectorant and stimulant and in plasters

ammoniac

Medical Definition of ammoniac (Entry 2 of 2)

— see sal ammoniac

WORD OF THE DAY

Test Your Vocabulary

Commonly Confused Words Quiz

  • vector image of a face with thought expression
  • I went to the ______ store to buy a birthday card.
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!