n.
Pronunciation: ə - ' m ō -n ē - ˌ ak
Function: noun
Etymology: Middle English & Latin; Middle English, from Latin ammoniacum, from Greek amm ō niakon, from neuter of amm ō niakos of Ammon
Date: 15th century
: the aromatic gum resin of a southwest Asian herb ( Dorema ammoniacum ) of the carrot family used as an expectorant and stimulant and in plasters