Contributors in Science
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travertine
Science; General science
A rather dense, banded limestone (see illus. ), sometimes moderately porous, that is formed by evaporation about springs, as is tufa, or in caves as stalactites, stalagmites, or ...
percent
Science; General science
A ratio comparison of two quantities expressed by using 100 equal parts, or hundredths; symbolized %. There are three major uses of percent: part of a whole, rate, and comparison ...
dehydrogenation
Science; General science
A reaction in which hydrogen is detached from a molecule. The reaction is strongly endothermic; therefore, heat must be supplied to maintain the reaction temperature. Since ...
agglutination reaction
Science; General science
A reaction in which suspended particles are aggregated or clumped. It occurs upon the admixture of another type of particle, a change in the composition of the suspending fluid, ...
antigen-antibody reaction
Science; General science
A reaction that occurs when an antigen combines with a corresponding antibody to produce an immune complex. A substance that induces the immune system to form a corresponding ...
passive radar
Science; General science
A receive-only radar used for search, tracking, surveillance, identification, guidance, and mapping. The techniques used are similar to those in radiometry; passive radar could be ...
fossil
Science; General science
A record of earlier life buried in rock. Originally meaning any distinctive object that has been dug up (from Latin fodio , dig), the term “fossil” soon came to refer ...
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