Columbia Encyclopedia

(Encyclopedia) turquoise, hydrous phosphate of aluminum and copper, Al2(OH)3PO4·H2O+Cu, used as a gem. It occurs rarely in crystal form, but is usually cryptocrystalline. Turquoise is opaque and has a waxy luster; ...

(Encyclopedia) wildcat, common name of Old World cats (Felis silvestris) of Europe, Asia, and Africa. The wildcat resembles a large domestic tabby cat with a heavy tail; its fur is brownish to gray, with a pattern o...

(Encyclopedia) bandicoot, small marsupial mammal native to Australia and nearby islands. There are 19 species in eight genera. Bandicoots have long, pointed, shrewlike faces; gray or brown fur; and long, bushy, ratl...

(Encyclopedia) Scottish deerhound, breed of tall hound developed in Scotland in the 16th and 17th cent. It stands from 28 to 32 in. (71.1–81.3 cm) high at the shoulder and weighs from 75 to 110 lb (34.0–49.9 kg)...

(Encyclopedia) Front Range, an eastern range of the U.S. Rocky Mts., bordering the Great Plains and extending c.300 mi (480 km) S from SE Wyo. to the Arkansas River, S central Colo. It has several peaks, including G...

(Encyclopedia) magnesite măgˈnəsīt [key], mineral, magnesium carbonate, MgCO3, white, yellow, or gray in color. It originates through the alteration of olivine or of serpentine by waters carrying carbon dioxide;...

(Encyclopedia) Irish wolfhound, breed of very large hound whose origins may be traced back many centuries in Ireland. The tallest of dogs, it stands about 34 in. (86.4 cm) high at the shoulder and weighs about 140 l...

(Encyclopedia) old English sheepdog, breed of large, wiry working dog developed in England in the early 19th cent. It stands from 21 to 25 in. (53.3–63.5 cm) high at the shoulder and weighs from 55 to 65 lb (24.9�...

(Encyclopedia) dolomite dōˈləmītˌ, dŏlˈə– [key]. 1 Mineral, calcium magnesium carbonate, CaMg (CO3)2. It is commonly crystalline and is white, gray, brown, or reddish in color with a vitreous to pearly lus...

(Encyclopedia) blue jay, common name for a familiar bird (Cyanocitta cristata) of central and E North America, allied to the crow, the raven, and the magpie, belonging to the family Corvidae. Almost a foot (30 cm) l...