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Nauru

(Encyclopedia)Nauru näo͞oˈro͞o [key], officially Republic of Nauru, atoll and independent republic (2015 est. pop. 11,000), c.8 sq mi (20 sq km), central Pacific, just south of the equator and west of the Gilbe...

Pluto, in astronomy

(Encyclopedia)Pluto, in astronomy, a dwarf planet and the first Kuiper belt, or transneptunian, object (see comet) to be discovered (1930) by astronomers. Pluto has an elliptical orbit usually lying beyond that of ...

Buenos Aires

(Encyclopedia)Buenos Aires bwāˈnəs īˈrēz, ârˈēz, Span. bwāˈnōs īˈrās ...

vision

(Encyclopedia)CE5 Optic nerve vision, physiological sense of sight by which the form, color, size, movements, and distance of objects are perceived. Defects of vision include astigmatism, color blindness, far...

utility, public

(Encyclopedia)utility, public, industry required by law to render adequate service in its field at reasonable prices to all who apply for it. Public utilities frequently operate as monopolies in their market. In th...

wave, in the earth sciences

(Encyclopedia)CE5 A. Diagram of wave: Wave travels one wavelength during one period B. Diagram of wave: Phase relationships wave, in oceanography, an oscillating movement up and down, of a body of water caused ...

Russo-Turkish Wars

(Encyclopedia)Russo-Turkish Wars. The great eastward expansion of Russia in the 16th and 17th cent., during the decline of the Ottoman Empire, nevertheless left the shores of the Black Sea in the hands of the Ottom...

Tibetan Buddhism

(Encyclopedia)Tibetan Buddhism, form of Buddhism prevailing in the Tibet region of China, Bhutan, the state of Sikkim in India, Mongolia, and parts of Siberia and SW China. It has sometimes been called Lamaism, fro...

reproductive system

(Encyclopedia)CE5 Reproductive system reproductive system, in animals, the anatomical organs concerned with production of offspring. In humans and other mammals the female reproductive system produces the femal...

serf

(Encyclopedia)serf, under feudalism, peasant laborer who can be generally characterized as hereditarily attached to the manor in a state of semibondage, performing the servile duties of the lord (see also manorial ...