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Arabs

(Encyclopedia)Arabs, name originally applied to the Semitic peoples of the Arabian Peninsula. It now refers to those persons whose primary language is Arabic. They constitute most of the population of Algeria, Bahr...

submersible

(Encyclopedia)submersible, small, mobile undersea research vessel capable of functioning in the ocean depths. Development of a great variety of submersibles during the later 1950s and 1960s came about as a result o...

seismology

(Encyclopedia)seismology sīzmŏlˈəjē, sīs– [key], scientific study of earthquakes and related phenomena, including the propagation of waves and shocks on or within the earth by natural or artificially genera...

catalyst

(Encyclopedia)catalyst, substance that can cause a change in the rate of a chemical reaction without itself being consumed in the reaction; the changing of the reaction rate by use of a catalyst is called catalysis...

Victoria, queen of Great Britain and Ireland

(Encyclopedia)Victoria (Alexandrina Victoria) ălˌĭgzăndrēˈnə [key], 1819–1901, queen of Great Britain and Ireland (1837–1901) and empress of India (1876–1901). She was the daughter of Edward, duke of K...

child abuse

(Encyclopedia)child abuse, physical, sexual, or emotional maltreatment or neglect of children by parents, guardians, or others responsible for a child's welfare. Physical abuse is characterized by physical injury, ...

navy

(Encyclopedia)navy, originally, all ships of a nation, whether for war or commerce; the term navy now designates only such vessels as are built and maintained specifically for war. There have been three major devel...

machine

(Encyclopedia)machine, arrangement of moving and stationary mechanical parts used to perform some useful work or to provide transportation. From a historical perspective, many of the first machines were the result ...

solution

(Encyclopedia)CE5 Solubility curves solution, in chemistry, homogeneous mixture of two or more substances. The dissolving medium is called the solvent, and the dissolved material is called the solute. A solutio...

Phoenicia

(Encyclopedia)Phoenicia fĭnēˈshə [key], ancient territory occupied by Phoenicians. The name Phoenicia also appears as Phenice and Phenicia. These people were Canaanites (see Canaan), and in the 9th cent. b.c. t...