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hedge

(Encyclopedia)hedge, ornamental or protective barrier composed of shrubs or small trees growing in close rows. The plants may be allowed to grow naturally or may be trimmed to various heights and shapes (see topiar...

starch

(Encyclopedia)starch, white, odorless, tasteless, carbohydrate powder. It plays a vital role in the biochemistry of both plants and animals and has important commercial uses. In green plants starch is produced by p...

carbon cycle

(Encyclopedia)CE5 Carbon cycle carbon cycle, in biology, the exchange of carbon between living organisms and the nonliving environment. Inorganic carbon dioxide in the atmosphere is converted by plants into sim...

Nicolle, Charles Jules Henri

(Encyclopedia)Nicolle, Charles Jules Henri shärl zhül äNrēˈ nēkôlˈ [key], 1866–1936, French physician and microbiologist. He worked with P. P. É. Roux in Paris and was director of the Pasteur Institute i...

Hamilton, Alice

(Encyclopedia)Hamilton, Alice, 1869–1970, American toxicologist, physician, and educator, b. New York City, M.D. Univ. of Michigan, 1893; she continued her studies in Germany. A pioneer in industrial diseases and...

Brown, Michael Stuart

(Encyclopedia)Brown, Michael Stuart, 1941–, American molecular geneticist, b. New York City, M.D. Univ. of Pennsylvania, 1966. He worked (1968–71) as a researcher at the National Institutes of Health before goi...

fallow land

(Encyclopedia)fallow land, cropland that is not seeded for a season; it may or may not be plowed. The land may be cultivated or chemically treated for control of weeds and other pests or may be left unaltered. Allo...

larkspur, in botany

(Encyclopedia)larkspur, any north temperate, Old World annual of the genus Consolida of the buttercup family. Consolida species were formerly classified in the genus Delphinium, which includes similar annual, bienn...

rabbitbrush

(Encyclopedia)rabbitbrush, name for shrubby plants of the American genus Chrysothamnus of the family Asteraceae (aster family). They grow in arid regions of the W United States and in Mexico and are characteristic ...