Am-mō'ni-ae or Gūm-am-mō'ni-ae, n.

n. [Lat. Ammoniacum, Gr. ἀμμωνιακόν, a resinous gum, said to distill from a tree near the temple of Jupiter Ammon, Plin., Diosc. See AMMONITE.] (Med.) The concrete juice of an umbelliferous plant, the Dorema ammoniacum, brought from Persia in large masses, composed of tears, internally white, and externally yellow. It has a peculiar smell, and a nauseous, sweet taste, followed by a bitter one. It is inflammable, soluble in water and spirit of wine, and is used in medicine as an expectorant and resolvent, and for the formation of certain plasters.