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Longhorn Cavern

(Encyclopedia)Longhorn Cavern, limestone cave, central Tex., at Burnet. On the northern edge of the Edwards Plateau, the cave (explored length c.8 mi/13 km) lies beneath a triangular ridge rising above the valley o...

Gawain, Sir

(Encyclopedia)Gawain, Sir gäˈwān, –wĭn [key], one of the most popular heroes of Arthurian legend; nephew of King Arthur. He was regarded, particularly in the early romances, as the model of chivalry—pure, b...

Galahad, Sir

(Encyclopedia)Galahad, Sir gălˈəhădˌ [key], hero of Arthurian legend. He was the son of Launcelot and Elaine, the daughter of King Pelles. Because he was the noblest and purest of the knights of Christendom, h...

Mordred, Sir

(Encyclopedia)Mordred, Sir: see Arthurian legend. ...

Modred, Sir

(Encyclopedia)Modred, Sir: see Arthurian legend. ...

Launcelot, Sir

(Encyclopedia)Launcelot, Sir lănˈsəlŏtˌ, lŏnˈ–, lônˈ– [key], in Arthurian legend, bravest and most celebrated knight at the court of King Arthur. He was kidnapped as an infant by the mysterious Lady of...

Percivale, Sir

(Encyclopedia)Percivale, Sir: see Arthurian legend and Parsifal. ...

Pelleas, Sir

(Encyclopedia)Pelleas, Sir: see Arthurian legend. ...

transplantation, medical

(Encyclopedia)transplantation, medical, surgical procedure by which a tissue or organ is removed and replaced by a corresponding part, usually from another part of the body or from another individual. A life-saving...

Dewar, Sir James

(Encyclopedia)Dewar, Sir James dyo͞oˈər [key], 1842–1923, British chemist and physicist, b. Scotland. He was professor of chemistry (from 1877) at the Royal Institution, London, and later was director of the D...