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Apalachee

(Encyclopedia)Apalachee ăpˌəlăchˈē [key], tribe of Native North Americans once centered about Apalachee Bay, NW Florida, belonging to the Muskogean branch of the Hokan-Siouan linguistic stock (see Native Amer...

International Union for the Conservation of Nature and Natural Resources

(Encyclopedia)International Union for the Conservation of Nature and Natural Resources (IUCN), formerly World Conservation Union, international organization founded in 1948 to encourage the preservation of wildlife...

dragon's blood

(Encyclopedia)dragon's blood, name for a red resin obtained from a number of different plants. It was held by early Greeks, Romans, and Arabs to have medicinal properties; Dioscorides and other early writers descri...

Helpmann, Sir Robert

(Encyclopedia)Helpmann, Sir Robert, 1909–1986, Australian dancer and choreographer. He danced as a principal (1933–50) with Sadler's Wells Ballet (now the Royal Ballet), often partnering with Margot Fonteyn. Hi...

bauxite

(Encyclopedia)bauxite bôkˈsīt, bŏkˈ– [key], mixture of hydrated aluminum oxides usually containing oxides of iron and silicon in varying quantities. A noncrystalline substance formerly thought to be a minera...

Spectral Classes for Main Sequence Stars (table)

(Encyclopedia)Characteristics of Spectral Classes for Main Sequence Stars ...

Perrault, Charles

(Encyclopedia)Perrault, Charles shärl pĕrōˈ [key], 1628–1703, French poet. His collections of eight fairy tales, Histoires ou contes du temps passé [stories or tales of olden times] (1697) gave classic form ...

pheromones

(Encyclopedia)pheromones, any of a variety of substances, secreted by many animal species, that alter the behavior of individuals of the same species. Sex attractant pheromones, secreted by a male or female to attr...

zinnia

(Encyclopedia)zinnia, any species of the genus Zinnia of the family Asteraceae (aster family), native chiefly to Mexico, though some range as far north as Colorado and as far south as Guatemala. The common zinnia o...

Benedict's solution

(Encyclopedia)Benedict's solution, deep-blue alkaline solution used to test for the presence of the aldehyde functional group, −CHO. The substance to be tested is heated with Benedict's solution; formation of a b...