Copy of `Princeton University - WordNet - a lexical database for the English language`

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Princeton University - WordNet - a lexical database for the English language Category: General Date & country: 27/01/2008, USA Words: 85192

radio source
noun an object that radiates radio waves

radio spectrum
radio-frequency spectrum noun the entire spectrum of electromagnetic frequencies used for communications; includes frequencies used for radio and radar and television

radio station
noun station for the production and transmission of radio broadcasts

radio telescope
radio reflector noun astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extraterrestrial sources

radio transmitter
noun transmitter that is the part of a radio system that transmits signals

radio wave
radio emission noun an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m

radio-controlled
adjective operated and guided by radio; `a radio-controlled airplane`

radio-phonograph
radio-gramophone noun electronic equipment consisting of a combination of a radio receiver and a record player

radioactive
adjective exhibiting or caused by radioactivity; `radioactive isotope`; `radioactive decay`; `radioactive fallout`

radioactive dating
noun measurement of the amount of radioactive material (usually carbon 14) that an object contains; can be used to estimate the age of the object

radioactive decay
noun the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation

radioactive iodine excretion test
noun radioactive iodine test that measures the amount of radioactive iodine excreted in the urine

radioactive iodine test
noun test of thyroid function in which the patient is give an oral does of radioactive iodine-131

radioactive iodine uptake test
RAIU noun radioactive iodine test that measures the amount of radioactive iodine taken up by the thyroid gland

radioactive material
noun material that is radioactive

radioactive waste
noun useless radioactive materials that are left after some laboratory or commercial process is completed

radioactively
adverb in a radioactive manner; `radioactively labeled`

radioactivity unit
noun a measure of radioactivity

radiobiology
noun the branch of biology that studies the effects of radiation on living organisms

radiocarbon
carbon 14 noun a radioactive isotope of carbon

radiocarbon dating
carbon dating noun a chemical analysis used to determine the age of organic materials based on their content of the radioisotope carbon-14; believed to be reliable up to 40,000 years

radiochemistry
nuclear chemistry noun the chemistry of radioactive substances

radiochlorine
noun a radioactive isotope of chlorine

radiogram
radiograph noun a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays)

radiographer
noun a person who makes radiographs

radiographic
adjective relating to or produced by radiography

radiography
noun photography that uses other kinds of radiation than visible light

radioimmunoassay
noun immunoassay of a substance that has been radioactively labeled

radioisotope
noun a radioactive isotope of an element; produced either naturally or artificially

Radiolaria
order Radiolaria noun marine protozoa

radiolarian
noun protozoa with amoeba-like bodies and radiating filamentous pseudopods

radiologic technologist
noun a scientist trained in radiological technology

radiological
adjective of or relating to radiology

radiologist
radiotherapist noun a medical specialist who uses radioactive substances and X-rays in the treatment of disease

radiology
noun the branch of medical science dealing with the medical use of X-rays or other penetrating radiation

radiolucent
adjective almost complete transparent to X-rays or other forms of radiation; `radiolucent tissues`

radiolysis
noun molecular disintegration resulting from radiation

radiometer
noun meter to detect and measure radiant energy (electromagnetic or acoustic)

radiomicrometer
noun radiometer that is extremely sensitive

radiopacity
radio-opacity noun opacity to X-rays or other radiation

radiopaque
radio-opaque adjective not transparent to X-rays or other forms of radiation; `barium sulfate is radiopaque`

radiopaque dye
noun dye that does not allow the passage of X rays or other radiation; used to outline certain organs during X-ray examination

radiopharmaceutical
noun pharmaceutical consisting of a radioactive compound used in radiation therapy

radiophotograph
radiophoto noun a photograph transmitted by radio waves

radiophotography
noun transmission of photographs by radio waves

radioprotection
noun protection against harmful effects of radiation

radioscopy
radiology noun (radiology) examination of the inner structure of opaque objects using X rays or other penetrating radiation

radiosensitive
adjective sensitive to radiation; `radiosensitive cancer cells can be treated with radiotherapy`

radiotelegraph
radiotelegraphy noun the use of radio to send telegraphic messages (usually by Morse code)

radiotelephone
radiotelephony noun telephony that uses transmission by radio rather than by wire

radiotelephonic
radiophonic adjective relating to or by means of radiotelephony

radiotherapy
radiation therapy noun (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance

radiotherapy equipment
noun equipment used to treat diseases with x-rays or radioactivity

radish
noun pungent fleshy edible root

radish
Japanese radish noun radish of Japan with a long hard durable root eaten raw or cooked

radish plant
noun a cruciferous plant of the genus Raphanus having a pungent edible root

radium
Ra noun an intensely radioactive metallic element that occurs in minute amounts in uranium ores

radium therapy
Curietherapy noun the use of radium in radiation therapy

radius
r noun the length of a line segment between the center and circumference of a circle or sphere

radius of curvature
noun the radius of the circle of curvature; the absolute value of the reciprocal of the curvature of a curve at a given point

radius vector
noun a line connecting a point in space to the origin of a polar coordinate system

radome
radar dome noun a housing for a radar antenna; transparent to radio waves

radon
Rn noun a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health

Radyera
genus Radyera noun very small species of shrubs of southern hemisphere: bush hibiscus

raffia
raphia noun leaf fibers of the raffia palm tree; used to make baskets and mats etc.

raffia palm
Raffia farinifera noun a large feather palm of Africa and Madagascar having very long pinnatisect fronds yielding a strong commercially important fiber from its leafstalks

Raffia vinifera
noun a palm of the genus Raffia

raffinose
noun a trisaccharide that occurs in sugar beets and cotton seeds and certain cereals

raffle
noun a lottery in which the prizes are goods rather than money

Raffles
Sir Thomas Raffles noun British colonial administrator who founded Singapore (1781-1826)

Rafflesiaceae
family Rafflesiaceae noun a family of parasitic plants of the order Aristolochiales

raft
noun a flat float (usually made of logs or planks) that can be used for transport or as a platform for swimmers

raft foundation
noun a foundation (usually on soft ground) consisting of an extended layer of reinforced concrete

rafter
balk noun one of several parallel sloping beams that support a roof

raftered
adjective having the rafters especially having them visible; `a raftered ceiling`

raftsman
raftman noun someone who travels by raft

rag
shred noun a small piece of cloth or paper

rag
bedevil verb treat cruelly; `The children tormented the stuttering teacher`

rag day
noun a day on which university students hold a rag

rag doll
noun a cloth doll that is stuffed and (usually) painted

rag paper
noun paper made partly or wholly from rags

ragamuffin
tatterdemalion noun a dirty shabbily clothed urchin

ragbag
noun a bag in which rags are kept

rage
noun a state of extreme anger; `she fell into a rage and refused to answer`

ragged
adjective worn out from stress or strain; `run ragged`

ragged orchid
ragged orchis noun fringed orchid of the eastern United States having a greenish flower with the lip deeply lacerate

ragged robin
cuckoo flower noun common perennial native to Europe and western Asia having usually pink flowers with ragged petals

raggedly
jaggedly adverb with a ragged and uneven appearance; `a long beard, raggedly cut`

raggedly
adverb in a ragged irregular manner; `a stone wall trails raggedly through the woods`

raggedness
noun shabbiness by virtue of being in rags

raging
adjective very severe; `a raging thirst`; `a raging toothache`

raglan
noun a garment (coat or sweater) that has raglan sleeves

raglan sleeve
noun a sleeve that extends in one piece to the neckline of a coat or sweater with seams from the armhole to the neck

Ragnar Frisch
Ragnar Anton Kittil Frisch noun Norwegian economist noted for his work in econometrics (1895-1973)

ragout
noun well-seasoned stew of meat and vegetables

ragpicker
noun an unskilled person who picks up rags from trash cans and public dumps as a means of livelihood

ragsorter
noun a worker who sorts rags and old clothing for new uses (as in papermaking)

ragtime
noun music with a syncopated melody (usually for the piano)

ragweed
noun any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma

ragweed pollen
noun pollen of the ragweed plant is a common allergen