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Ovshinsky, Stanford Robert

(Encyclopedia)Ovshinsky, Stanford Robert, 1922–2012, American inventor and scientist, b. Akron, Ohio. Self-taught, he developed a new type of lathe in the 1940s, the first of many innovations and patents. Special...

Owen, Robert Dale

(Encyclopedia)Owen, Robert Dale, 1801–77, American social reformer, b. Scotland; son of Robert Owen. He studied at his father's New Lanark school and in Switzerland. In 1825 he went to New Harmony, Ind. There he ...

Peary, Robert Edwin

(Encyclopedia)Peary, Robert Edwin pērˈē [key], 1856–1920, American arctic explorer, b. Cresson, Pa. In 1881 he entered the U.S. navy as a civil engineer and for several years served in Nicaragua, where he was ...

Peel, Sir Robert

(Encyclopedia)Peel, Sir Robert, 1788–1850, British statesman. The son of a rich cotton manufacturer, whose baronetcy he inherited in 1830, Peel entered Parliament as a Tory in 1809. He served (1812–18) as chief...

Oppenheimer, J. Robert

(Encyclopedia)Oppenheimer, J. Robert ŏpˈənhīˌmər [key], 1904–67, American physicist, b. New York City, grad. Harvard (B.A., 1925), Ph.D. Univ. of Göttingen, 1927. He taught at the Univ. of California and t...

Ayton, Sir Robert

(Encyclopedia)Ayton or Aytoun, Sir Robert both: āˈtən [key], 1570–1638, English poet and courtier. He was private secretary to the queens of James I and Charles I, besides holding other posts of honor. He wrot...

dew

(Encyclopedia)dew, thin film of water that has condensed on the surface of objects near the ground. Dew forms when radiational cooling of these objects during the nighttime hours also cools the shallow layer of ove...

growing season

(Encyclopedia)growing season, period during which plant growth takes place. In temperate climates the growing season is limited by seasonal changes in temperature and is defined as the period between the last killi...

cold frame

(Encyclopedia)cold frame, in horticulture, sun-heated board frame covered with a removable top of glass or other transparent material and sunk into the ground. The top may be solid or slatted or screened for shade....

cryolite

(Encyclopedia)cryolite or kryolite both: krīˈəlītˌ [key] [Gr.,=frost stone], mineral usually pure white or colorless but sometimes tinted in shades of pink, brown, or even black and having a luster like that o...