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Abbe, Ernst

(Encyclopedia)Abbe, Ernst ĕrnst äˈbə [key], 1840–1905, German physicist. He was appointed professor at the Univ. of Jena in 1870 and director of its astronomical and meteorological observatories in 1878. From...

bougainvillea

(Encyclopedia)bougainvillea or bougainvillaea both: bo͞oˌgənvĭlˈēə [key] [for L. A. de Bougainville], any plant of the genus Bougainvillea of the family Nyctaginaceae (four-o'clock family); chiefly tropical ...

animal

(Encyclopedia)animal, any member of the animal kingdom (kingdom Animalia), as distinguished from organisms of the plant kingdom (kingdom Plantae) and the kingdoms Fungi, Protista, and Monera in the five-kingdom sys...

Pinophyta

(Encyclopedia)Pinophyta pīˌnŏfˈətə [key], division of the plant kingdom consisting of those organisms commonly called gymnosperms. The gymnosperms, a group that includes the pine, have stems, roots and leaves...

nuclear winter

(Encyclopedia)nuclear winter, theory holding that the smoke and dust produced by a large nuclear war would result in a prolonged period of cold on the earth. The earliest version of the theory, which was put forwar...

arnica

(Encyclopedia)arnica ärˈnəkə [key], any plant of the genus Arnica, yellow-flowered perennials of the family Asteraceae (aster family), native to north temperate and arctic regions. In North America, arnicas gro...

Mohl, Hugo von

(Encyclopedia)Mohl, Hugo von ho͞oˈgō fən mōl [key], 1805–72, German botanist. He is noted for his research on the nature of protoplasm and chlorophyll and on the physiology of higher plant forms. Mohl was pr...

Laon

(Encyclopedia)Laon läN [key], commercial town (1990 pop. 28,670), capital of Aisne dept., N France. It has forges, a printing plant, and factories that make heating equipment and metal goods. Situated on a rocky h...

manna

(Encyclopedia)manna mănˈə [key], in the Bible, edible substance provided by God for the people of Israel in the wilderness. In the Book of Exodus it is compared to coriander seed and described as fine, white, an...

sandbur

(Encyclopedia)sandbur or bur grass, any species of the genus Cenchrus of the family Poaceae (grass family), sandy-soil plants of tropical and temperate regions. At maturity the sharp spines and burlike seeds make t...