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electrolysis

(Encyclopedia)CE5 Electrolysis: In a typical reaction electrodes are placed in a solution of hydrogen chloride, HCl, which contains both hydrogen and chlorine ions. The battery removes electrons from the anode, ...

refrigeration

(Encyclopedia)CE5 Compression system of refrigeration refrigeration, process for drawing heat from substances to lower their temperature, often for purposes of preservation. Refrigeration in its modern, portabl...

caliphate

(Encyclopedia)caliphate kălˈĭfˌ [key], the spiritual head and temporal ruler of the Islamic state. In principle, Islam is theocratic: when Muhammad died, a caliph [Arab.,=successor] was chosen to rule in his pl...

laissez-faire

(Encyclopedia)laissez-faire lĕsˌā fârˈ [key] [Fr.,=leave alone], in economics and politics, doctrine that an economic system functions best when there is no interference by government. It is based on the belie...

mint, in botany

(Encyclopedia)CE5 Spearmint Mentha spicata mint, in botany, common name for members of the Labiatae, a large family of chiefly annual or perennial herbs. Several species are shrubby or climbing forms or, rarely...

God

(Encyclopedia)God, divinity of the three great monotheistic religions, Judaism, Christianity, and Islam, as well as many other world religions. See also religion and articles on individual religions. There are se...

democracy

(Encyclopedia)democracy [Gr.,=rule of the people], term originating in ancient Greece to designate a government where the people share in directing the activities of the state, as distinct from governments controll...

song

(Encyclopedia)song, relatively brief, simple vocal composition, usually a setting of a poetic text, often strophic, for accompanied solo voice. The song literature of Western music embodies two broad classification...

suicide

(Encyclopedia)suicide [Lat.,=self-killing], the deliberate taking of one's own life. Suicide may be compulsory, prescribed by custom or enjoined by the authorities, usually as an alternative to death at the hands o...

Olympic games

(Encyclopedia)CE6 Olympic games, premier athletic meeting of ancient Greece, and, in modern times, series of international sports contests. The modern revival of the Olympic games is due in a large measure to ...