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palm
(Encyclopedia)palm, common name for members of the Palmae, a large family of chiefly tropical trees, shrubs, and vines. Most species are treelike, characterized by a crown of compound leaves, called fronds, termina...jet propulsion
(Encyclopedia)CE5 Types of jet engines: In the propeller-driven turbine a stream of high-velocity gases provides the power to drive the turbine and turn the propeller. In the jet-driven turbine the stream of gas...Paleolithic period
(Encyclopedia)Paleolithic period pāˌlēəlĭthˈĭk, –lēō–, pălˌ– [key] or Old Stone Age, the earliest period of human development and the longest phase of mankind's history. It is approximately coexten...first aid
(Encyclopedia)first aid, immediate and temporary treatment of a victim of sudden illness or injury while awaiting the arrival of medical aid. Proper early measures may be instrumental in saving life and ensuring a ...Arabia
(Encyclopedia)Arabia ərāˈbēə [key], peninsula (1991 est. pop. 35,000,000), c.1,000,000 sq mi (2,590,000 sq km), SW Asia. It is bordered on the W by the Gulf of Aqaba and the Red Sea, on the S by the Gulf of Ad...camera
(Encyclopedia)CE5 Image formed by a camera camera, lightproof box or container, usually fitted with a lens, which gathers incoming light and concentrates it so that it can be directed toward the film (in an opt...Saudi Arabia
(Encyclopedia)CE5 Saudi Arabia säo͞oˈdē ərāˈbēə, souˈ–, sô– [key], officially Kingdom of Saudi Arabia, kingdom (2015 est. pop. 27,752,000), 829,995 sq mi (2,149,690 sq km), comprising most of the ...Japanese art
(Encyclopedia)Japanese art, works of art created in the islands that make up the nation of Japan. In the mid-19th cent. a few print designers attained distinction, but no masters appeared to equal their p...rubber
(Encyclopedia)CE5 Basic molecules in rubber rubber, any solid substance that upon vulcanization becomes elastic; the term includes natural rubber (caoutchouc) and synthetic rubber. The term elastomer is sometim...Natives, North American
(Encyclopedia)Natives, North American, peoples who occupied North America before the arrival of the Europeans in the 15th cent. They have long been known as Indians because of the belief prevalent at the time of Co...Browse by Subject
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