Today's Word of the Day means...
lead 1 (lēd)
Any of the conductors designed to detect changes in electrical potential when situated in or on the body and connected to an instrument that registers and records these changes, such as an electrocardiograph.
A record made from the current supplied by one of these conductors.
lead 2 (lěd)
A soft ductile dense metallic element. Atomic number 82; atomic weight 207.19; melting point 327.5°C; boiling point 1,749deg;C; specific gravity 11.35; valence 2, 4.
A soft, ductile, heavy, bluish-gray metallic element that is extracted chiefly from galena. It is very durable and resistant to corrosion and is a poor conductor of electricity. Lead is used to make radiation shielding and containers for corrosive substances. It was once commonly used in pipes, solder, roofing, paint, and antiknock compounds in gasoline, but its use in these products has been curtailed because of its toxicity. Atomic number 82; atomic weight 207.2; melting point 327.5°C; boiling point 1,744°C; specific gravity 11.35; valence 2, 4. See Periodic Table. See Note at element.
city, Lawrence county, western South Dakota, U.S. It lies in the northern Black Hills, about 40 miles (65 km) northwest of Rapid City, at an elevation of 5,280 feet (1,609 metres). Situated just southwest of Deadwood, it is built on the steep inclines of the hills. It was established in 1876 following the discovery of gold by Fred and Moses Manuel, and its name was inspired by the lode mines in the area, an outcrop of ore being termed a "lead." Lead was South Dakota's largest city at the time of statehood in 1889. The city lost a major aspect of its economy with the closing of the Homestake Gold Mine (opened 1876), which was the world's oldest continuously operating gold mine until it closed in 2001; chemist Raymond Davis received the 2002 Nobel Prize for Physics for his work in detecting neutrinos in a laboratory in the mine. Tourism, based primarily on the more than 80 gambling halls in Deadwood (where gambling was legalized in 1989), is now an economic mainstay. Some ranching and lumbering also take place in the area. Lead is surrounded by Black Hills National Forest and has many outdoor recreational opportunities, including two ski areas. The Black Hills Mining Museum has a simulation of an underground gold mine. Inc. 1890. Pop. (1990) 3,632; (2000) 3,027.