Devices containing fissionable material in sufficient quantity and so arranged as to be capable of maintaining a controlled, self-sustaining NUCLEAR FISSION chain reaction. They are also known as atomic piles, atomic reactors, fission reactors, and nuclear piles, although such names are deprecated. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A country in CENTRAL AMERICA, bordering both the Caribbean Sea and the North Pacific Ocean, between COLOMBIA and COSTA RICA.
D003105
Colombia
A country in northern South America, bordering the Caribbean Sea, between Panama and Venezuela, and bordering the north Pacific Ocean, between Ecuador and Panama. The capital is Bogota.
D004463
Ecology
The branch of science concerned with the interrelationship of organisms and their ENVIRONMENT, especially as manifested by natural cycles and rhythms, community development and structure, interactions between different kinds of organisms, geographic distributions, and population alterations. (Webster's, 3d ed)
Bionomics,Ecologies
D006801
Humans
Members of the species Homo sapiens.
Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D014878
Water Pollution, Radioactive
Contamination of water with radioactive materials and/or substances.
Pollution, Radioactive Water,Radioactive Water Pollution