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Bradstreet, Anne (Dudley)

(Encyclopedia)Bradstreet, Anne (Dudley), c.1612–1672, early American poet, b. Northampton, England, considered the first significant woman author in the American colonies. She came to Massachusetts in the Winthro...

chlorophyll

(Encyclopedia)CE5 chlorophyll klôrˈəfĭlˌ [key], green pigment that gives most plants their color and enables them to carry on the process of photosynthesis. Chemically, chlorophyll has several similar forms...

Kelvin temperature scale

(Encyclopedia)Kelvin temperature scale, a temperature scale having an absolute zero below which temperatures do not exist. Absolute zero, or 0K, is the temperature at which molecular energy is a minimum, and it c...

stereochemistry

(Encyclopedia)stereochemistry, study of the three-dimensional configuration of the atoms that make up a molecule and the ways in which this arrangement affects the physical and chemical properties of the molecule. ...

Archimedes

(Encyclopedia)Archimedes ärkĭmēˈdēz [key], 287–212 b.c., Greek mathematician, physicist, and inventor. He is famous for his work in geometry (on the circle, sphere, cylinder, and parabola), physics, mechanic...

Swinburne, Algernon Charles

(Encyclopedia)Swinburne, Algernon Charles, 1837–1909, English poet and critic. His poetry is noted for its vitality and for the music of its language. After attending Eton (1849–53) and Oxford (1856–60) he se...

ion, in chemistry

(Encyclopedia)ion, atom or group of atoms having a net electric charge. Ionization has many applications. Vapor lamps and fluorescent lamps take advantage of the light given off when positive ions recombine with ...

nutrition

(Encyclopedia)nutrition, study of the materials that nourish an organism and of the manner in which the separate components are used for maintenance, repair, growth, and reproduction. Nutrition is achieved in vario...

Ness, Loch

(Encyclopedia)Ness, Loch lŏkh [key], lake, 22 mi (35 km) long, Highland, N central Scotland, in the Great Glen. More than 700 ft (213 m) deep and ice free, it is fed by the Oich and other streams and drained by th...

Nexø, Martin Andersen

(Encyclopedia)Nexø, Martin Andersen märˈtēn änˈdərsĕn nĕksö [key], 1869–1954, Danish novelist. Born one of 11 children in a Copenhagen slum, he spent his impoverished childhood largely on the island of ...