rack railway
1: railway for steep mountains; a cogwheel on the locomotive engages cogs on a center rail to provide traction [syn: {cog railway}]
rack up
1: gain points in a game; "The home team scored many times"; "He hit a home run"; "He hit .300 in the past season" [syn: {score}, {hit}, {tally}] 2: place in a rack; "rack pool balls" 3: defeat thorou...
racker
1: an attendant who puts pool or billiard balls into a rack
racket
1: a loud and disturbing noise 2: an illegal enterprise (such as extortion or fraud or drug peddling or prostitution) carried on for profit [syn: {fraudulent scheme}, {illegitimate enterprise}] 3: the...
racketeer
1: some who commits crimes for profit (especially one who obtains money by fraud or extortion) v : carry on illegal business activities involving crime
racketiness
1: characterized by loud and constant noise [syn: {noisiness}]
rackety
1: uncontrollably noisy [syn: {rip-roaring}, {uproarious}]
racking
1: causing great physical or mental suffering; "a wrenching pain" [syn: {wrenching}]
racon
1: a device that, on receiving radar signals, transmits coded signals in response to help navigators determine their position [syn: {radar beacon}]
raconteur
1: a person skilled in telling anecdotes [syn: {anecdotist}]
racoon
1: an omnivorous nocturnal mammal native to North America and Central America [syn: {raccoon}]
racquet
1: a sports implement (usually consisting of a handle and an oval frame with a tightly interlaced network of strings) used to strike a ball (or shuttlecock) in various games [syn: {racket}]
racquetball
1: the ball used in playing the game of racquetball 2: a game played on a handball court with short-handled rackets
racy
1: full of zest or vigor; "a racy literary style" [syn: {lively}] 2: suggestive of sexual impropriety; "a blue movie"; "blue jokes"; "he skips asterisks and gives you the gamy details"; "a juicy scand...
rad
1: a unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material 2: the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center...
radar
1: measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects [syn: {microwave radar}, {radio detection and ranging}, {radiolocation}]
radar beacon
1: a device that, on receiving radar signals, transmits coded signals in response to help navigators determine their position [syn: {racon}]
radar dome
1: a housing for a radar antenna; transparent to radio waves [syn: {radome}]
radar echo
1: an electronic signal that has been reflected back to the radar antenna; contains information about the location and distance of the reflecting object
radar fire
1: gunfire aimed a target that is being tracked by radar
radar target
1: a radar echo displayed so as to show the position of a reflecting surface [syn: {blip}, {pip}]
Radclyffe Hall
1: English writer whose novel about a lesbian relationship was banned in Britain for many years (1883-1943) [syn: {Hall}, {Marguerite Radclyffe Hall}]
raddle
1: a red iron ore used in dyeing and marking [syn: {ruddle}, {reddle}] v 1: twist or braid together, interlace [syn: {ruddle}] 2: mark or paint with raddle
raddled
1: worn until no longer useful; "battered trumpets and raddled radios"; "worn-out shoes with flapping soles" [syn: {worn-out}] 2: showing the wearing effects of overwork or care or suffering; "looking...
Radhakrishnan
1: Indian philosopher and statesman who introduced Indian philosophy to the West (1888-1975) [syn: {Sarvepalli Radhakrishnan}, {Sir Sarvepalli Radhakrishnan}]
radial
1: relating to or near the radius; "the radial aspect of the forearm" 2: relating to or moving along or having the direction of a radius; "radial velocity" 3: issuing in rays from a common centerXs; r...
radial artery
1: branch of the brachial artery beginning below the elbow and extending down the forearm around the wrist and into the palm [syn: {arteria radialis}]
radial asymmetry
1: the absence of symmetry about an axis [ant: {radial symmetry}]
radial engine
1: an internal-combustion engine having cylinders arranged radially around a central crankcase [syn: {rotary engine}]
radial keratotomy
1: radial pattern of incisions in the cornea that cause the cornea to bulge; performed to correct myopia
radial nerve
1: largest branch of the brachial plexus; extends down the humerus to the lateral epicondyle where it divides into one branch that goes to the skin on the back of the hand and another that goes to the...
radial pulse
1: pulse of the radial artery (felt in the wrist)
radial symmetry
1: the property of symmetry about an axis; "the starfish illustrates radial symmetry" [ant: {radial asymmetry}]
radial tire
1: pneumatic tire that has radial-ply casing [syn: {radial}, {radial-ply tire}]
radial vein
1: superficial veins ascending the radial side of the forearm; combines with the ulnar veins to form the brachial vein [syn: {vena radialis}]
radial velocity
1: velocity along the line of sight toward or away from the observer
radial-ply
1: of or relating to automobile tires that have a strip under the tread and relatively little stiffening in the sidewalls; "radial-ply tires"
radial-ply tire
1: pneumatic tire that has radial-ply casing [syn: {radial}, {radial tire}]
radially
1: in a radial manner; "an imaginative dispersal of the pews radially from the central focus of the pulpit"
radially symmetrical
1: having a symmetrical arrangement of radiating parts about a central point [syn: {centrosymmetric}]
radian
1: the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degree...
radiance
1: the amount of electromagnetic radiation leaving or arriving at a point on a surface [syn: {glow}, {glowing}] 2: the quality of being bright and sending out rays of light [syn: {radiancy}, {shine}, ...
radiancy
1: the quality of being bright and sending out rays of light [syn: {radiance}, {shine}, {effulgence}, {refulgence}, {refulgency}]
radiant
1: radiating or as if radiating light; "the beaming sun"; "the effulgent daffodils"; "a radiant sunrise"; "a refulgent sunset" [syn: {beaming}, {beamy}, {effulgent}, {refulgent}]
radiant energy
1: energy that is transmitted in the form of (electromagnetic) radiation; energy that exists in the absence of matter
radiant flux
1: the rate of flow of radiant energy (electromagnetic waves)
radiant heating
1: heating a building by radiation from panels containing hot water or electrical heaters
radiantly
1: in a radiant manner; "the bride smiled radiantly"
radiate
1: send out rays or waves; "The sun radiates heat" 2: send out real or metaphoric rays; "She radiates happiness" 3: extend or spread outward from a center or focus or inward towards a center; "spokes ...
radiating
1: diverging from a common point [syn: {radiating(a)}]
radiation
1: energy that is radiated or transmitted in the form of rays or waves or particles 2: the act of spreading outward from a central source 3: syndrome resulting from exposure to ionizing radiation (e.g...
radiation diagram
1: graphical representation (in polar or cartesian coordinates) of the spatial distribution of radiation from an antenna as a function of angle [syn: {radiation pattern}, {pattern}]
radiation field
1: a field that represents the energy lost from the radiator to space
radiation pattern
1: graphical representation (in polar or cartesian coordinates) of the spatial distribution of radiation from an antenna as a function of angle [syn: {radiation diagram}, {pattern}]
radiation pressure
1: the minute pressure exerted on a surface normal to the direction of propagation of a wave [syn: {corpuscular-radiation pressure}]
radiation pyrometer
1: a pyrometer for estimating the temperature of distant sources of heat; radiation is focussed on a thermojunction connected in circuit with a galvanometer
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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}]
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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