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root, in botany

(Encyclopedia)CE5 Longitudinal cross section of a root root, in botany, the descending axis of a plant, as contrasted with the stem, the ascending axis. In most plants the root is underground, but in epiphytes ...

Lyon, Mary

(Encyclopedia)Lyon, Mary līˈən [key], 1797–1849, American educator, founder of Mt. Holyoke College, b. Buckland, Mass. She attended three academies in Massachusetts; later she taught at Ashfield, Mass., London...

Sun Belt

(Encyclopedia)Sun Belt or Sunbelt, southern tier of the United States, focused on Florida, Texas, Arizona, and California, and extending as far north as Virginia. The term gained wide use in the 1970s, when the eco...

evaporation

(Encyclopedia)evaporation, change of a liquid into vapor at any temperature below its boiling point. For example, water, when placed in a shallow open container exposed to air, gradually disappears, evaporating at ...

Douhet, Giulio

(Encyclopedia)Douhet, Giulio jo͞oˈlyō do͞oāˈ [key], 1869–1930, Italian military officer and early advocate of airpower. He was an early supporter of strategic bombing and the military superiority of air for...

refraction

(Encyclopedia)refraction, in physics, deflection of a wave on passing obliquely from one transparent medium into a second medium in which its speed is different, as the passage of a light ray from air into glass. O...

Cimarron

(Encyclopedia)Cimarron sĭmˈərŏnˌ [key], river, 698 mi (1,123 km) long, rising in NE N.Mex., and flowing generally E to the Arkansas River, W of Tulsa, Okla. It follows the direct route of the Santa Fe Trail fo...

cocoa-plum

(Encyclopedia)cocoa-plum, sweet but somewhat dry fruit of the evergreen tree Chrysobalanus icaco, of the family Chyrsobalanaceae. The fruits are eaten fresh and often made into preserves. An oil used for making can...

achene

(Encyclopedia)achene əkēnˈ [key], dry, simple, one-seeded fruit with the seed attached to the inner wall at only one point. Achenes are indehiscent, i.e., they do not split open at maturity. The so-called seed o...

kratom

(Encyclopedia)kratom, drug obtained from the leaves of the tropical evergreen tree Mitragyna speciosa, also called kratom, a relative of the coffee tree found in Southeast Asia. The leaves are chewed, boiled for a ...