Columbia Encyclopedia

Search results

500 results found

goldfish

(Encyclopedia)goldfish, freshwater fish, genus Carassius, of the family Cyprinidae, popular in aquariums and ponds. Native to China, it was first domesticated centuries ago from the wild form, an olive-colored carp...

jungle fowl

(Encyclopedia)jungle fowl, common name for small, terrestrial wild fowl comprising four species in the genus Gallus. Most important of these is the red jungle fowl, which Charles Darwin determined to be the ancesto...

corundum

(Encyclopedia)corundum kərŭnˈdəm [key], mineral, aluminum oxide, Al2O3. The clear varieties are used as gems and the opaque as abrasive materials. Corundum occurs in crystals of the hexagonal system and in mass...

quebracho

(Encyclopedia)quebracho kābräˈchō [key], name for a tanning substance and for the trees from which it comes, chiefly the red quebracho, or quebracho colorado (Schinopsis lorentzii), of the family Anacardiaceae ...

state flowers

(Encyclopedia)state flowers. Each state of the United States has designated, usually by legislative action, one flower as its floral emblem; the rose has been designated by Congress as the national flower of the Un...

brownstone

(Encyclopedia)brownstone, red to brown variety of sandstone. Its unusual color is caused in some instances by the presence of red iron oxide which acts as a cement, binding the sand grains together. Vast thicknesse...

Agassiz, Lake

(Encyclopedia)Agassiz, Lake ăgˈəsē [key], glacial lake of the Pleistocene epoch, c.700 mi (1,130 km) long, 250 mi (400 km) wide, formed by the melting of the continental ice sheet beginning some 14,000 years ag...

Rhine

(Encyclopedia)Rhine rīn [key], Du. Rijn, Fr. Rhin, Ger. Rhein, Lat. Rhenus, principal river of Europe, c.820 mi (1,320 km) long. It rises in the Swiss Alps and flows generally north, passing through or bordering o...

Northeast Canyons and Seamounts Marine National Monument

(Encyclopedia)Northeast Canyons and Seamounts Marine National Monument, 4,913 sq mi (12,725 sq km), NW Atlantic Ocean, 130 mi (210 km) off the coast of Cape Cod; est. 2016. The monument is divided into two areas; o...

tunicate

(Encyclopedia)tunicate to͞oˈnəkĭt [key], marine animal of the phylum Chordata, which also includes the vertebrates. The adult form of most tunicates (also called urochordates) shows no resemblance to vertebrate...