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convection

(Encyclopedia)convection, mode of heat transfer in fluids (liquids and gases). Convection depends on the fact that, in general, fluids expand when heated and thus undergo a decrease in density (since a given volume...

gonorrhea

(Encyclopedia)gonorrhea gŏnərēˈə [key], common infectious disease caused by a bacterium (Neisseria gonorrhoeae), involving chiefly the mucous membranes of the genitourinary tract. It may occasionally spread to...

Guaraní

(Encyclopedia)Guaraní gwäränēˈ [key], indigenous group living in the eastern lowland area of South America, related to the Tupí of the Rio São Francisco and the Tupinambá on the Atlantic coast. The Guaraní...

monkeypox

(Encyclopedia)monkeypox, rare disease caused by infection with the monkeypox virus, which is related to the viruses that cause smallpox and cowpox. The symptoms of monkeypox, which typically take 1 to 2 weeks to ap...

nettle

(Encyclopedia)nettle, common name for the Urticaceae, a family of fibrous herbs, small shrubs, and trees found chiefly in the tropics and subtropics. Several genera of nettles are covered with small stinging hairs ...

mandrill

(Encyclopedia)mandrill, large monkey, Mandrillus sphinx, of central W Africa, related to the baboons. Mandrills are found in forests, while baboons live in open country. The fur of the mandrill is mostly dark brown...

Magna Graecia

(Encyclopedia)Magna Graecia măgˈnə grēˈshə [key] [Lat.,=great Greece], Greek colonies of S Italy. The Greek overseas expansion of the 8th cent. b.c. founded a number of towns that became the centers of a new,...

Mazepa, Ivan

(Encyclopedia)Mazepa, Ivan ēvänˈ məzyāˈpə [key], c.1640–1709, Cossack hetman [leader] in the Russian Ukraine. He was made hetman (1687) on the insistence of Prince Gallitzin, adviser to the Russian regent,...

Khoikhoi

(Encyclopedia)Khoikhoi koiˈkoiˌ [key], people numbering about 55,000 mainly in Namibia and in W South Africa. The Khoikhoi have been called Hottentots by whites in South Africa. In language and in physical type t...

Kootenai, indigenous group of North America

(Encyclopedia)Kootenai ko͞otˈənāˌ [key], group of Native North Americans who in the 18th cent. occupied the so-called Kootenai country (i.e., N Montana, N Idaho, and SE British Columbia). Their language is tho...