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ammoniac

American  
[uh-moh-nee-ak] / əˈmoʊ niˌæk /

noun

  1. Also ammoniacum gum ammoniac.

adjective

  1. ammoniacal.

ammoniac 1 British  
/ əˈməʊnɪˌæk /

adjective

  1. a variant of ammoniacal

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
ammoniac 2 British  
/ əˈməʊnɪˌæk /

noun

  1. Also called: gum ammoniac.  a strong-smelling gum resin obtained from the stems of the N Asian umbelliferous plant Dorema ammoniacum and formerly used as an expectorant, stimulant, perfume, and in porcelain cement

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of ammoniac

1375–1425; late Middle English armoniac, ammoniak < Latin ammōniacum < Greek ammōniakón (neuter of ammōniakós of Ammon; -i-, -ac ), applied to a salt and a gum resin prepared near the Shrine of Ammon in Libya

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.