Columbia Encyclopedia

Search results

500 results found

Puntarenas

(Encyclopedia)Puntarenas po͞ontärāˈnäs [key], town (1995 est. pop. 40,706), capital of Puntarenas prov., W Costa Rica, on the Gulf of Nicoya. Formerly the country's principal port on the Pacific, it has been s...

dogfish

(Encyclopedia)dogfish, name for a number of small sharks of several different families. Best known are the spiny dogfishes (family Squalidae) and the smooth dogfishes (family Triakidae). Spiny dogfishes have two sp...

elasmobranch

(Encyclopedia)elasmobranch ĭlăsˈməbrăngk [key], cartilaginous fish, member of the subclass Elasmobranchii of the vertebrate class Chondrichthyes (see Chordata). This group includes sharks, skates, and rays. ...

fishing

(Encyclopedia)fishing, act of catching fish for consumption or display. Fishing—usually by hand, club, spear, net, and (at least as early as 23,000 years ago) by hook—was known to prehistoric people. It was pra...

Nyad, Diana

(Encyclopedia)Nyad, Diana nīˈăd [key], 1949–, American distance swimmer, b. New York City as Diana Sneed, grad. Lake Forest College, 1973. She began swimming seriously as a teenager, becoming interested in dis...

Convention on International Trade in Endangered Species of Wild Fauna and Flora

(Encyclopedia)Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), international agreement that aims to ensure that trade in specimens of wild animals and plants does not threate...

Hergé

(Encyclopedia)Hergé, pseud. of Georges Remi, 1907–83, Belgian cartoonist, creator of the cartoon character Tintin. The boy reporter and his faithful fox terrier Milou (Snowy in English translations) first debute...

ray, in zoology

(Encyclopedia)ray, extremely flat-bodied cartilaginous marine fish, related to the shark. The pectoral fins of most rays are developed into broad, flat, winglike appendages, attached all along the sides of the head...

zinc oxide

(Encyclopedia)zinc oxide, chemical compound, ZnO, that is nearly insoluble in water but soluble in acids or alkalies. It occurs as white hexagonal crystals or a white powder commonly known as zinc white. Zinc white...

gills, in biology

(Encyclopedia)CE5 Gills of a fish: Side view (A) and ventral view (B) gills, external respiratory organs of most aquatic animals. In fishes the gills are located in gill chambers at the rear of the mouth (phary...