the coiled, chambered fossil shell of an ammonoid. a nitrogenous mixture consisting chiefly of dried animal fats, usually obtained from livestock carcasses, and used as a fertilizer. an inhabitant of . of or relating to the Ammonites. Historical Examples ammonites and belemnites are abundant and gasteropods are very common (Nerinea, Chemnitzia, Bourgetia, &c.). Encyclopaedia Britannica, […]
the univalent ion, NH 4 + , or group, NH 4 , which plays the part of a metal in the salt formed when ammonia reacts with an acid. Contemporary Examples ammonium nitrate is extremely common, and pretty dangerous, and also extremely useful. The Most Dangerous Substance in America May Be Fertilizer Megan McArdle April […]
- Ammonium acetate
a white, crystalline, deliquescent, water-soluble solid, NH 4 (C 2 H 3 O 2), used chiefly in the manufacture of dyes and meat preservatives. Historical Examples To determine the presence of lead some of the powder was extracted with ammonium acetate solution. The Propaganda for Reform in Proprietary Medicines, Vol. 2 of 2 Various Lead […]
- Ammonium alum
. a crystalline solid, AlNH 4 (SO 4) 2 ⋅12H 2 O, used chiefly as a size in the manufacture of paper; alum.