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pier

(Encyclopedia) pier, in engineering, term applied to a mass of reinforced concrete or masonry supporting a large structure, such as a bridge. When piers are built on ground of poor bearing value, it…

overture

(Encyclopedia) overture, instrumental musical composition written as an introduction to an opera, ballet, oratorio, musical, or play. The earliest Italian opera overtures were simply pieces of…

voltaic cell

(Encyclopedia) voltaic cell, a simple device with which chemical energy is converted into electrical energy. Two dissimilar metals (e.g., copper and zinc) are immersed in an electrolyte (e.g., a…

Évora

(Encyclopedia) Évora Évora ĕˈvôrə [key], town, capital of Évora dist. and of Altro Alentejo, S…

commensalism

(Encyclopedia) commensalismcommensalismkəmĕnˈsəlĭzˌəm [key], relationship between members of two different species of organisms in which one individual is usually only slightly benefited, while the…

analogy

(Encyclopedia) CE5 Analogy in bird and insect wings analogy, in biology, the similarities in function, but differences in evolutionary origin, of body structures in different organisms. For…

amphoterism

(Encyclopedia) amphoterismamphoterismămˌfətĕrˈĭzm [key], in chemistry, the property of certain substances of acting either as acids or as bases depending on the reaction in which they are involved.…

cameo

(Encyclopedia) cameocameokămˈēō [key], small relief carving, usually on striated precious or semiprecious stones or on shell. The design, often a portrait head, is commonly cut in the light-colored…

Taxco

(Encyclopedia) TaxcoTaxcotäsˈkō [key], town (1990 pop. 43,836), Guerrero state, S Mexico. Founded in 1529 as a silver-mining community, Taxco was also an important stop between Mexico City and…

timberline

(Encyclopedia) timberline, elevation above which trees cannot grow. Its location is influenced by the various factors that determine temperature, including latitude, prevailing wind directions, and…