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Kangaroo Island

(Encyclopedia)Kangaroo Island, island, c.1,700 sq mi (4,400 sq km), S Australia, in South Australia at the entrance to Gulf St. Vincent. It is 93 mi (150 km) long and 35 mi (57 km) wide. The chief products are barl...

Karnal

(Encyclopedia)Karnal kərnälˈ [key], city (1991 pop. 176,131), Haryana state, N central India. The town's name is derived from Karna, the rival of Arjuna in the Sanskrit Mahabharata epic. It is on the Delhi-Ambal...

Trapani

(Encyclopedia)Trapani träˈpänē [key], city (1991 pop. 69,497), capital of Trapani prov., W Sicily, Italy, a seaport on a promontory in the Mediterranean Sea. The city's exports include marsala wine, salt, and t...

tetraethyl lead

(Encyclopedia)tetraethyl lead tĕtˌrəĕthˈəl [key], (C2H5)4Pb, viscous, colorless, poisonous liquid. It is an organometallic compound prepared by reacting ethyl chloride with a sodium-lead alloy. When added to ...

vulcanization

(Encyclopedia)vulcanization vŭlˌkənəzāˈshən [key], treatment of rubber to give it certain qualities, e.g., strength, elasticity, and resistance to solvents, and to render it impervious to moderate heat and c...

citric acid

(Encyclopedia)citric acid or 2-hydroxy-1,2,3-propanetricarboxylic acid, HO2CCH2C(OH)(CO2H)CH2CO2H, an organic carboxylic acid containing three carboxyl groups; it is a solid at room temperature, melts at 153℃, an...

sulfuric acid

(Encyclopedia)sulfuric acid, chemical compound, H2SO4, colorless, odorless, extremely corrosive, oily liquid. It is sometimes called oil of vitriol. Although sulfuric acid is now one of the most widely used c...

Amadeus, Lake

(Encyclopedia)Amadeus, Lake əmăˈdēəs [key], large, usually dry, shallow salt lake, 340 sq mi (881 sq km), 76 mi (122 km) long, 12 mi (19 km) wide, SW Northern Territory, Australia. The lakebed is usually cover...

thorium

(Encyclopedia)thorium thôrˈēəm [key] [from Thor], radioactive chemical element; symbol Th; at. no. 90; mass number of most stable isotope 232; m.p. about 1,750℃; b.p. about 4,790℃; sp. gr. 11.7 at 20℃; va...

Namib

(Encyclopedia)Namib näˈmĭb [key], desert, c.800 mi (1,290 km) long and from 30 to 100 mi (50–160 km) wide, SW Africa, along the coast of Namibia. It occupies a rocky platform between the Atlantic Ocean and the...