radiation sickness
1: syndrome resulting from exposure to ionizing radiation (e.g., exposure to radioactive chemicals or to nuclear explosions); low doses cause diarrhea and nausea and vomiting and sometimes loss of hai...
radiation syndrome
1: syndrome resulting from exposure to ionizing radiation (e.g., exposure to radioactive chemicals or to nuclear explosions); low doses cause diarrhea and nausea and vomiting and sometimes loss of hai...
radiation therapy
1: (medicine) the treatment of disease (especially cancer) by exposure to radiation from a radioactive substance [syn: {radiotherapy}, {radiation}, {actinotherapy}, {irradiation}]
radiator
1: any object that radiates energy 2: heater consisting of a series of pipes for circulating steam or hot water to heat rooms or buildings 3: a mechanism consisting of a metal honeycomb through which ...
radiator cap
1: cap on the opening in the top of a radiator through which a coolant liquid can be added
radiator grille
1: grating that admits cooling air to car's radiator [syn: {grille}]
radiator hose
1: a flexible hose between the radiator and the engine block
radical
1: (used of opinions and actions) far beyond the norm; "extremist political views"; "radical opinions on education"; "an ultra conservative" [syn: {extremist}, {ultra}] 2: markedly new or introducing ...
radical cell
1: a cell of terrorists (usually 3 to 5 members); "to insure operational security the members of adjacent terrorist cells usually don't know each other or the identity of their leadership" [syn: {terr...
radical chic
1: an affectation of radical left-wing views and the fasionable dress and lifestyle that goes with them
radical hysterectomy
1: surgical removal of the uterus and the ovaries and oviducts and cervix and related lymph nodes [syn: {panhysterectomy}]
radical mastectomy
1: removal of a breast and the underlying muscles (pectoralis major and pectoralis minor) and lymph nodes in the adjacent armpit
radical sign
1: a sign placed in front of an expression to denote that a root is to be extracted [syn: {radical}]
radicalism
1: the political orientation of those who favor revolutionary change in government and society
radically
1: in a radical manner; "she took a radically different approach"
radicchio
1: prized variety of chicory having globose heads of red leaves
radicle
1: (anatomy) a small structure resembling a rootlet (such as a fibril of a nerve)
Radiigera
1: a genus of fungus belonging to the family Geastraceae [syn: {genus Radiigera}]
Radiigera fuscogleba
1: a fungus similar to an earthstar except that it does not open up; the spore mass is brown at maturity with a column of sterile tissue extending up into it
radio
1: indicating radiation or radioactivity; "radiochemistry" n 1: medium for communication [syn: {radiocommunication}, {wireless}] 2: an electronic receiver that detects and demodulates and amplifies tr...
radio aerial
1: omnidirectional antenna comprising the part of a radio receiver by means of which radio signals are received [syn: {radio antenna}]
radio antenna
1: omnidirectional antenna comprising the part of a radio receiver by means of which radio signals are received [syn: {radio aerial}]
radio astronomy
1: the branch of astronomy that detects and studies the radio waves emitted by celestial bodies
radio beacon
1: a characteristic signal emitted by a transmitter used for navigation 2: a radio station that broadcasts a directional signal for navigational purposes [syn: {beacon}]
radio beam
1: a signal transmitted along a narrow path; guides pilots in darkness or bad weather [syn: {beam}]
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radio compass
1: a direction finder that gives a bearing by determining the direction of incoming radio signals
radio detection and ranging
1: measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects [syn: {radar}, {microwave radar}, {radiolocation}]
radio emission
1: an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m [syn: {radio wave}, {radio radiation}]
radio frequency
1: an electromagnetic wave frequency between audio and infrared
radio interferometer
1: radio telescope that uses interference patterns from two antennas instead of a parabolic antenna
radio link
1: a two-way radio communication system (usually microwave); part of a more extensive telecommunication network [syn: {link}]
radio radiation
1: an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m [syn: {radio wave}, {radio emission}]
radio receiver
1: an electronic receiver that detects and demodulates and amplifies transmitted signals [syn: {receiving set}, {radio set}, {radio}, {tuner}, {wireless}]
radio reflector
1: astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extra-terrestrial sources [syn: {radio telescope}]
radio set
1: an electronic receiver that detects and demodulates and amplifies transmitted signals [syn: {radio receiver}, {receiving set}, {radio}, {tuner}, {wireless}]
radio signal
1: a radio wave used to transmit and receive messages
radio spectrum
1: the entire spectrum of electromagnetic frequencies used for communications; includes frequencies used for radio and radar and television [syn: {radio-frequency spectrum}]
radio station
1: station for the production and transmission of radio broadcasts
radio telescope
1: astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extra-terrestrial sources [syn: {radio reflector}]
radio transmitter
1: transmitter that is the part of a radio system that transmits signals
radio wave
1: an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m [syn: {radio emission}, {radio radiation}]
radio-controlled aircraft
1: an aircraft without a pilot that is operated by remote control [syn: {drone}, {pilotless aircraft}]
radio-frequency spectrum
1: the entire spectrum of electromagnetic frequencies used for communications; includes frequencies used for radio and radar and television [syn: {radio spectrum}]
radio-gramophone
1: electronic equipment consisting of a combination of a radio receiver and a record player [syn: {radio-phonograph}]
radio-opacity
1: opacity to X-rays or other radiation [syn: {radiopacity}]
radio-opaque
1: not transparent to X-rays or other forms of radiation; "barium sulfate is radiopaque" [syn: {radiopaque}] [ant: {radiolucent}]
radio-phonograph
1: electronic equipment consisting of a combination of a radio receiver and a record player [syn: {radio-gramophone}]
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