ammonia or ammonia .. ( Of the lat. ) ammoniacum, and this of the g ? µµ?(to?, Amun, Jupiter, Libya). 1. m. Quím. Colorless gas, odor irritating, soluble in water, composed of a nitrogen atom and three hydrogen. It is a core product in the chemical industry. (Fórm.) NH 3 ). 2. m. Quím. Aqueous solution of ammonia to 35 per cent, from gaseous ammonia . 3. m. resinous gum in tears or in mass, composed of lumps of red on the outside and white on the inside, yellow with flavour something bitter, foul and unpleasant odor. It was used as a medicinal expectorant.