Of+similar+crystalline+form
51medicine, history of — Introduction the development of the prevention and treatment of disease from prehistoric and ancient times to the 20th century. Medicine and surgery before 1800 Primitive (primitive culture) medicine and folklore Unwritten history is not… …
52Arsenic trisulfide — Arsenic trisulfide …
53Isomer — This article is about the chemical concept. For isomerism of atomic nuclei, see nuclear isomer. In chemistry, isomers (from Greek ἰσομερής, isomerès; isos = equal , méros = part ) are compounds with the same molecular formula but different… …
54aging — ag·ing (āʹjĭng) n. 1. The process of growing old or maturing. 2. An artificial process for imparting the characteristics and properties of age. * * * Gradual change in an organism that leads to increased risk of weakness, disease, and death. It… …
55surface analysis — ▪ chemistry Introduction in analytical chemistry (chemistry), the study of that part of a solid that is in contact with a gas or a vacuum. When two phases of matter are in contact, they form an interface. The term surface is usually… …
56Pearl — For other uses, see Pearl (disambiguation). Pearl Pearls General Category Mineral Chemical formula Ca …
57Europe — /yoor euhp, yerr / for 1; /yoo roh pee, yeuh / for 2, n. 1. a continent in the W part of the landmass lying between the Atlantic and Pacific oceans, separated from Asia by the Ural Mountains on the E and the Caucasus Mountains and the Black and… …
58Crack cocaine — A pile of crack cocaine ‘rocks’ Crack cocaine is the freebase form of cocaine that can be smoked. It may also be termed rock, hard, iron …
59Precious Stones in the Bible — Precious Stones in the Bible † Catholic Encyclopedia ► Precious Stones in the Bible Precious stones are stones remarkable for their colour, brilliancy, or rarity. Such stones have at all times been held in high esteem everywhere,… …
60Iron pillar of Delhi — For other uses, see Ashoka Pillar (disambiguation). The iron pillar of Delhi The iron pillar of Delhi, India, is a 7 m (23 ft) high pillar in the Qutb complex, notable for the composition of the metals used in its construction. The… …
