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parthenogenesis

(Encyclopedia)parthenogenesis pärˌthənōjĕnˈəsĭs [key] [Gr.,=virgin birth], in biology, a form of reproduction in which the ovum develops into a new individual without fertilization. Natural parthenogenesis ...

carbonated beverage

(Encyclopedia)carbonated beverage, an effervescent drink that releases carbon dioxide under conditions of normal atmospheric pressure. Carbonation may occur naturally in spring water that has absorbed carbon dioxid...

trypanosomiasis

(Encyclopedia)trypanosomiasis trəpănˌəsōmīˈəsis [key], infectious disease caused by a protozoan organism, the trypanosome, which exists as a parasite in the blood of a number of vertebrate hosts. The three ...

Aldan, city, Russia

(Encyclopedia)Aldan əldänˈ [key], city (1989 pop. 27,000), Sakha Republic, E Siberian Russia, on the Aldan Plateau. Located on a major north-south highway of the region, it is also in the heart of an important g...

Nanticoke

(Encyclopedia)Nanticoke nănˈtĭkōk [key], city (1990 pop. 12,267), Luzerne co., NE Pa., on the Susquehanna River; founded 1793, inc. as a city 1926. It is largely residential. Plastic products are manufactured. ...

Rio Grande, river, Brazil

(Encyclopedia)Rio Grande, name of several rivers of Brazil. The largest rises in S Minas Gerais state, SE Brazil, and flows c.650 mi (1,050 km) NW to the Paranaíba River, with which it forms the Paraná River. Its...

Malle, Louis

(Encyclopedia)Malle, Louis lwē mäl [key], 1932–95, French film director, b. Thumeries, France. Malle's motion pictures are noted for their nonjudgmental approach to often taboo material, for which he sought to ...

herbal

(Encyclopedia)herbal, early botanical book containing descriptions and illustrations of herbs and plants with their properties, chiefly those qualities that made them useful as medicines or condiments. Most of the ...

acetate

(Encyclopedia)acetate ăsˈĭtātˌ [key], one of the most important forms of artificial cellulose-based fibers; the ester of acetic acid. The first patents for the production of fibers from cellulose acetate appea...

direction finder

(Encyclopedia)direction finder, electronic device used to determine the position of a ship or aircraft. In a simple direction finder a radio receiver is equipped with a revolving directional antenna. The antenna re...