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pregnancy

(Encyclopedia)pregnancy, period of time between fertilization of the ovum (conception) and birth, during which mammals carry their developing young in the uterus (see embryo). The average duration of pregnancy in h...

Prince Edward Island

(Encyclopedia)CE5 Prince Edward Island, province (2001 pop. 135,294), 2,184 sq mi (5,657 sq km), E Canada, off N.B. and N.S. The Mi'kmaq lived on the island before Europeans arrived. Jacques Cartier wrote ent...

colleges and universities

(Encyclopedia)colleges and universities, institutions of higher education. Universities differ from colleges in that they are larger, have wider curricula, are involved in research activities, and grant graduate an...

stellar evolution

(Encyclopedia)CE5 The above Hertzsprung-Russell (H-R) diagram shows the track of stellar evolution for a typical star. After spending much of its life evolving toward or along the main sequence, the star becomes...

intelligence

(Encyclopedia)intelligence, in psychology, the general mental ability involved in calculating, reasoning, perceiving relationships and analogies, learning quickly, storing and retrieving information, using language...

industrial management

(Encyclopedia)industrial management, term applied to highly organized modern methods of carrying on industrial, especially manufacturing, operations. Modern technological devices, particularly in the areas of com...

Navajo, indigenous people of North America

(Encyclopedia)Navajo or Navaho both: näˈvəhō [key], Native North Americans whose language belongs to the Athabascan branch of the Nadene linguistic stock (see Native American languages). A migration from the No...

tariff

(Encyclopedia)tariff, tax on imported and, more rarely, exported goods. It is also called a customs duty. Tariffs may be distinguished from other taxes in that their predominant purpose is not financial but economi...

Tennessee Valley Authority

(Encyclopedia)Tennessee Valley Authority (TVA), independent U.S. government corporate agency, created in 1933 by act of Congress; it is responsible for the integrated development of the Tennessee River basin. The h...

seismology

(Encyclopedia)seismology sīzmŏlˈəjē, sīs– [key], scientific study of earthquakes and related phenomena, including the propagation of waves and shocks on or within the earth by natural or artificially genera...