President of the United States
President Chief Executive | the office of the United States head of state, a President is elected every four years |
Attorney General
Attorney General of the United States | the position of the head of the Justice Department and the chief law enforcement officer of the United States, the post of Attorney General was created in |
scientific research
research project | research into questions posed by scientific theories and hypotheses |
radiotherapy
radiation therapy
radiation actinotherapy
irradiation | (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance |
| radiation | the act of spreading outward from a central source |
American Civil War
United States Civil War
War between the States | civil war in the United States between the North and the South, - |
atom bomb
atomic bomb
A-bomb
fission bomb
plutonium bomb | a nuclear weapon in which enormous energy is released by nuclear fission (splitting the nuclei of a heavy element like uranium or plutonium ) |
| atomic clock | a timepiece that derives its time scale from the vibration of atoms or molecules |
| atomic cocktail | an oral dose of radioactive substance used in treatment and diagnosis of cancer |
atomic pile
atomic reactor
pile
chain reactor | a nuclear reactor that uses controlled nuclear fission to generate energy |
atomic warhead
nuclear warhead
thermonuclear warhead
nuke | the warhead of a missile designed to deliver an atom bomb |
| Great Seal of the United States | the seal of the United States government |
National Library of Medicine
United States National Library of Medicine
U.S. National Library of Medicine | the world's largest medical library |
nuclear weapon
atomic weapon | a weapon of mass destruction whose explosive power derives from a nuclear reaction |
| radiation pyrometer | a pyrometer for estimating the temperature of distant sources of heat, radiation is focussed on a thermojunction connected in circuit with a galvanometer |
| scientific instrument | an instrument used by scientists |
United States Army Criminal Investigation Laboratory
U.S. Army Criminal Investigation Laboratory
US Army Criminal Investigation Laboratory
USACIL | a defense laboratory of the Criminal Investigation Command, the United States Army's primary forensic laboratory in support of criminal intelligence |
United States Mint
U.S. Mint
US Mint | the mint that manufactures and distributes United States coins for circulation through Federal Reserve Banks, processes gold and silver bullion |
atomic mass
atomic weight
relative atomic mass | (chemistry) the mass of an atom of a chemical element expressed in atomic mass units |
| acoustic radiation pressure | (acoustics) the pressure exerted on a surface normal to the direction of propagation of a sound wave |
optic radiation
radiatio optica | a nerve pathway from the lateral geniculate body to the visual cortex |
| radiation | a radial arrangement of nerve fibers connecting different parts of the brain |
| scientific method | a method of investigation involving observation and theory to test scientific hypotheses |
| scientific fact | an observation that has been confirmed repeatedly and is accepted as true (although its truth is never final) |
| Planck's radiation law | (physics) an equation that expresses the distribution of energy in the radiated spectrum of an ideal black body |
| scientific theory | a theory that explains scientific observations, scientific theories must be falsifiable |
| scientific knowledge | knowledge accumulated by systematic study and organized by general principles, mathematics is the basis for much scientific knowledge |
science
scientific discipline | a particular branch of scientific knowledge, the science of genetics |
agronomy
scientific agriculture | the application of soil and plant sciences to land management and crop production |
nuclear physics
atomic physics
nucleonics | the branch of physics that studies the internal structure of atomic nuclei |
atomism
atomic theory
atomist theory
atomistic theory | (chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particles, the ancient Greek philosophers Democritus and Epicurus held atomic theories of the universe |
| atomic theory | a theory of the structure of the atom |
United States Constitution
U.S. Constitution
US Constitution
Constitution Constitution of the United States | the constitution written at the Constitutional Convention in Philadelphia in and subsequently ratified by the original thirteen states |
United States Code
U. S. Code | a consolidation and codification by subject matter of the general and permanent laws of the United States, is prepared and published by a unit of the United States House of Representatives |
radiation pattern
radiation diagram
pattern | graphical representation (in polar or Cartesian coordinates) of the spatial distribution of radiation from an antenna as a function of angle |
nuclear explosion
atomic explosion | the explosion of an atomic bomb |
| background radiation | radiation coming from sources other than those being observed |
| radiation | the spread of a group of organisms into new habitats |
| adaptive radiation | the development of many different forms from an originally homogeneous group of organisms as they fill different ecological niches |
Lautaro Youth Movement
Lautaro Faction of the United Popular Action Movement
Lautaro Popular Rebel Forces | a violent terrorist group organized in the s and advocating the overthrow of the Chilean military government, leaders are mainly criminals or impoverished youths |
Revolutionary United Front
RUF | a terrorist group formed in the s in Sierra Leone, seeks to overthrow the government and gain control of the diamond producing regions, responsible for attacks on civilians and children, widespread torture and murder and using children to commit atrocities, sponsored by the president of Liberia |
United Self-Defense Force of Colombia
United Self-Defense Group of Colombia
Autodefensas Unidas de Colombia
AUC | a terrorist organization in Colombia formed in as an umbrella for local and regional paramilitary groups, is financed by earnings from narcotics and serves to protect the economic interests of its members, the AUC conducted over assassinations in one year |
British Commonwealth
Commonwealth of Nations | an association of nations consisting of the United Kingdom and several former British colonies that are now sovereign states but still pay allegiance to the British Crown |
| United Church of Christ | merger of the Congregational Christian Church and the Evangelical and Reformed Church in |
| Evangelical United Brethren Church | a Methodist denomination |
| United Methodist Church | union of the Wesleyan Methodist Church and the Evangelical United Brethren Church |
Atomic Energy Commission
AEC | a former executive agency (from to ) that was responsible for research into atomic energy and its peacetime uses in the United States |
United States Postal Service
US Postal Service
USPS | an independent federal agency that provides mail processing and delivery service for individuals and businesses in the United States |
United States Postal Inspection Service
US Postal Inspection Service | the primary law enforcement arm of the United States Postal Service |
United States Trade Representative
US Trade Representative | the executive agency that administers the President's policies on international trade |