Columbia Encyclopedia

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sand dollar

(Encyclopedia)sand dollar, common name for a marine animal in the same phylum as the starfish (see sea star). The sand dollar has a rigid, flattened, disk-shaped test, or shell, made of firmly united plates lying j...

Turpan

(Encyclopedia)Turpan to͝orˈfänˈ [key], town and oasis (1994 est. pop. 64,300), in the Turpan depression (c.5,000 sq mi/12,950 sq km), E Xinjiang Uygur Autonomous Region, China. It is an agricultural center prod...

Jenin

(Encyclopedia)Jenin jĕˈnēn [key], town (2003 est. pop. 34,000), West Bank, at the southern entrance to the Esdraelon Valley and on the northern edge of the Samarian Highlands. It is an important crossroads, urba...

moraine

(Encyclopedia)moraine mərānˈ [key], a formation composed of unsorted and unbedded rock and soil debris called till, which was deposited by a glacier. The till that falls on the sides of a valley glacier from the...

green flash

(Encyclopedia)green flash or emerald flash, a refractive phenomenon of the atmosphere where the top edge of the setting (or, less frequently, rising) sun will momentarily turn emerald green. The green color lasts f...

cuesta

(Encyclopedia)cuesta kwĕsˈtə [key], asymmetric ridge characterized by a short, steep escarpment on one side, and a long, gentle slope on the other. The steep side exposes the edge of erosion-resistant rock layer...

Columbia, U.S. space shuttle

(Encyclopedia)Columbia, U.S. space shuttle. On its 28th flight, on Feb. 1, 2003, after completing a 16-day scientific mission, the spacecraft disintegrated during reentry, killing its seven-person crew. About 16 mi...

Carlow, county, Republic of Ireland

(Encyclopedia)Carlow kärˈlō [key], county, 346 sq mi (896 sq km), SE Republic of Ireland. The chief town...

water wheel, device

(Encyclopedia)water wheel, device for utilizing the power of flowing or falling water. The Norse wheel is the oldest type known. Despite its name it probably originated in the Middle East, where the swift stream re...

Madoff, Bernard Lawrence

(Encyclopedia)Madoff, Bernard Lawrence māˈdôf [key], 1938–2021, American stockbroker, investment manager, and ...