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tidewater

(Encyclopedia)tidewater, in U.S. history, that part of the Atlantic coastal plain between the shoreline and the farthest upstream points in rivers reached by oceanic tides. In many cases the fall line is given as t...

chord, in geometry

(Encyclopedia)chord kôrd [key], in geometry, straight line segment both end points of which lie on the circumference of a circle or other curve; it is a segment of a secant. A chord passing through the center of a...

Dionne, Marcel

(Encyclopedia)Dionne, Marcel, 1951–, Canadian hockey player, b. Drummondville, Quebec. A talented offensive center, he was drafted (1971) by the National Hockey League (NHL)'s Detroit Red Wings. Moving to the Los...

five hundred

(Encyclopedia)five hundred, card game, similar in principle to euchre, usually played by three persons with a pack of 32 cards and a joker. Each player receives 10 cards, and highest bidder for the widow (the three...

Grange, Red

(Encyclopedia)Grange, Red (Harold Edward Grange), 1903–91, American football player, b. Forksville, Pa. Grange was All-America halfback at the Univ. of Illinois (1923–25). After a spectacular college career in ...

Poissy, Colloquy of

(Encyclopedia)Poissy, Colloquy of pwäsēˈ [key], 1561, conference of Roman Catholic prelates and Protestant ministers, initiated by Catherine de' Medici and Michel de L'Hôpital in the hope of bringing about a pe...

Pukaskwa National Park

(Encyclopedia)Pukaskwa National Park pŭkˈăskwə [key], c.725 sq mi (1,890 sq km), central Ont., Canada, near Marathon; est. 1971. Stretching for c.50 mi (80 km) along the north shore of Lake Superior between the...

Sulaiman Mountains

(Encyclopedia)Sulaiman Mountains so͞olīmänˈ [key], range, extending c.250 mi (400 km) from N to S along the western edge of the Indus River valley in E Baluchistan province, central Pakistan. The twin peaks of ...

midnight sun

(Encyclopedia)midnight sun, phenomenon in which the sun remains visible in the sky continuously for 24 hr or longer, occurring only in the polar regions. The midnight sun is due to the fact that the plane of the ea...

crossing over

(Encyclopedia)crossing over, process in genetics by which the two chromosomes of a homologous pair exchange equal segments with each other. Crossing over occurs in the first division of meiosis. At that stage each ...