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The Collaborative International Dictionary of English v.0.48 (gcide)

ammoniac \am*mo"ni*ac\ ([a^]m*m[=o]"n[i^]*[a^]k), Ammoniacal
\Am`mo*ni"a*cal\ ([a^]m`m[-o]*n[imac]"[.a]*kal), a.
Of, pertaining, or containing ammonia, or possessing its
properties; as, an ammoniac salt; ammoniacal gas.
[1913 Webster]

{Ammoniacal engine}, an engine in which the vapor of ammonia
is used as the motive force.

{Sal ammoniac} [L. sal ammoniacus], the salt usually called
{chloride of ammonium}, and formerly {muriate of ammonia}.
[1913 Webster] Gum ammoniac


Ammoniac \Am*mo"ni*ac\(or Gum ammoniac \Gum` am*mo"ni*ac\, n.
[L. Ammoniacum, Gr. 'ammoniako`n a resinous gum, said to
distill from a tree near the temple of Jupiter Ammon; cf. F.
ammoniac. See {Ammonite}.] (Med.)
The concrete juice (gum resin) of an umbelliferous plant, the
{Dorema ammoniacum}. It is brought chiefly from Iran in the
form of yellowish tears, which occur singly, or are
aggregated into masses. It has a peculiar smell, and a
nauseous, sweet taste, followed by a bitter one. It is
inflammable, partially soluble in water and in alcohol, and
is used in medicine as an expectorant and resolvent, and for
the formation of certain plasters.
[1913 Webster AS]

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