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nitric acid

(Encyclopedia)nitric acid, chemical compound, HNO3, colorless, highly corrosive, poisonous liquid that gives off choking red or yellow fumes in moist air. It is miscible with water in all proportions. It forms an a...

lipids

(Encyclopedia)lipids, a broad class of organic products found in living systems. Most are insoluble in water but soluble in nonpolar solvents. The definition excludes the mineral oils and other petroleum products o...

landslide

(Encyclopedia)landslide, rapid slipping of a mass of earth or rock from a higher elevation to a lower level under the influence of gravity and water lubrication. More specifically, rockslides are the rapid downhill...

blue whale

(Encyclopedia)blue whale, a baleen whale, Balaenoptera musculus. Also called the sulphur-bottom whale and Sibbald's rorqual, it is the largest animal that has ever lived. Blue whales have been known to reach a leng...

tenrec

(Encyclopedia)tenrec tĕnˈrĕk [key], any of the small insectivorous mammals of the family Tenrecidae, also called tendrecs or tanrecs. These animals are found on the island of Madagascar. In that closed environme...

river

(Encyclopedia)river, stream of water larger than a brook or creek. Land surfaces are never perfectly flat, and as a result the runoff after precipitation tends to flow downward by the shortest and steepest course i...

Djerid, Chott

(Encyclopedia)Djerid, Chott shôt jĕrēdˈ [key], salt lake, c.1,900 sq mi (4,920 sq km), W central Tunisia, N Africa. It is now an extensive salt flat with water only in its lower areas. ...

Fielding, Antony Vandyke Copley

(Encyclopedia)Fielding, Antony Vandyke Copley, 1787–1855, English landscape painter in watercolor. For the last 24 years of his life he was president of the Water Colour Society, where he exhibited yearly. Fieldi...

Galashiels

(Encyclopedia)Galashiels gălˌəshēlzˈ [key], town, Scottish Borders, SE Scotland, on the Gala Water. Famous for ...

Kislovodsk

(Encyclopedia)Kislovodsk kēsləvôtskˈ [key] [Rus.,=sour water], city (1989 pop. 114,000), S European Russia, in the N Caucasus Mts. It is a famous health resort with mineral springs, sanatoriums, and a physico-t...