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fluoridation
(Encyclopedia) fluoridationfluoridationfl&oobreve;rˌĭdāˈshən [key], process of adding a fluoride to the water supply of a community to preserve the teeth of the inhabitants. Tooth enamel…sugar
(Encyclopedia) sugar, compound of carbon, hydrogen, and oxygen belonging to a class of substances called carbohydrates. Sugars fall into three groups: the monosaccharides, disaccharides, and…thymus gland
(Encyclopedia) thymus glandthymus glandthīˈməs [key], mass of glandular tissue located in the neck or chest of most vertebrate animals. In humans, the thymus is a soft, flattened, pinkish-gray organ…Savigny, Friedrich Karl von
(Encyclopedia) Savigny, Friedrich Karl vonSavigny, Friedrich Karl vonfrēˈdrĭkh kärl fən säˈvĭnyē [key], 1779–1861, German jurist and legal historian, a founder of the historical school of…solar cell
(Encyclopedia) solar cell, semiconductor devised to convert light to electric current. It is a specially constructed diode, usually made of forms of crystalline silicon or of thin films (as of copper…space-time
(Encyclopedia) space-time, central concept in the theory of relativity that replaces the earlier concepts of space and time as separate absolute entities. In relativity one cannot uniquely…spraying
(Encyclopedia) spraying, horticultural practice of applying fungicides, insecticides, and herbicides, usually in solution, to plants. It may be accomplished by various means, e.g., the watering can,…rainmaking
(Encyclopedia) rainmaking, production of rain by artificial means now generally disregarded, though it is probable that rainmaking hastens or increases rainfall from clouds suitable for natural…tachyon
(Encyclopedia) tachyontachyontăkˈēŏnˌ [key], hypothetical elementary particle that travels only at speeds exceeding that of light. According to the theory of relativity, the speed of light is the…confession
(Encyclopedia) confession, in law, the formal admission of criminal guilt, usually obtained in the course of examination by the police or prosecutor or at trial. For a confession to be admissible as…Trending
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