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Tordesillas, Treaty of

(Encyclopedia) Tordesillas, Treaty ofTordesillas, Treaty oftōrˌᵺāsēˈlyäs [key], 1494, agreement signed at Tordesillas, Spain, by which Spain and Portugal divided the non-Christian world into two…

Charles Mound

(Encyclopedia) Charles Mound, hill, an ancient burial mound 1,241 ft (378 m) high, NW Ill., near the Wis. line; highest point in the state.

Lucania, Mount

(Encyclopedia) Lucania, Mount, 17,147 ft (5,226 m) high, in the St. Elias Mts., SW Yukon, Canada, near the Alaska line; Canada's third tallest peak.

transit instrument

(Encyclopedia) transit instrument or transit, telescope devised to observe stars as they cross the meridian and used for determining time. Its viewing tube swings on a rigid horizontal axis…

Boundary Peak

(Encyclopedia) Boundary Peak, 13,140 ft (4,005 m) high, SW Nev., in the White Mts. near the Calif. line. It is the highest point in Nevada.

Euclid, Greek mathematician

(Encyclopedia) EuclidEuclidy&oomacr;ˈklĭd [key], fl. 300 b.c., Greek mathematician. Little is known of his life other than the fact that he taught at Alexandria, being associated with the school…

Nedabiah

(Encyclopedia) NedabiahNedabiahnĕdˌəbīˈə [key], in the Bible, one of David's line.

Wettin

(Encyclopedia) WettinWettinvĕtˈĭn [key], German dynasty, which ruled in Saxony, Thuringia, Poland, Great Britain, Belgium, and Bulgaria. It takes its name from a castle on the Saale near Halle. The…

non-Euclidean geometry

(Encyclopedia) non-Euclidean geometry, branch of geometry in which the fifth postulate of Euclidean geometry, which allows one and only one line parallel to a given line through a given external…

Brasstown Bald

(Encyclopedia) Brasstown Bald, peak, 4,784 ft (1,458 m) high, N Ga., in the Blue Ridge of the Appalachian Mts., near the N.C. line. It is the highest point in Georgia.