1) Isotope
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Compare with isotope. A radioactive isotope. For example, tritium is a radioisotope of hydrogen.
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http://antoine.frostburg.edu/chem/senese/101/glossary/r.shtml
Radioisotopes, the most common being Carbon-14, are isotopes of elements which contain a high number of neutrons thus causing them to be structurally unstable. As a result the isotope may emit alpha, beta, or gamma radiation in order to become more stable. ...
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http://en.wikipedia.org/wiki/Radioisotope
[biology] ===Hurricane Isabel=== Category:Featured picture nominations Category:Featured picture nominations/February 2008 ...
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http://en.wikipedia.org/wiki/Radioisotope_(biology)
An unstable form of a chemical element that releases radiation as it breaks down and becomes more stable. Radioisotopes may occur in nature or be made in a laboratory. In medicine, they are used in imaging tests and in treatment. Also called radionuclide.
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http://www.cancer.gov/dictionary?expand=R
Contraction for words radioactive isotope of an element.
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http://www.chemicalglossary.net/definition/1442-Radioisotope
radioactive species of a given element
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a radioactive isotope of a specified element
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<chemical, radiobiology> Form of a chemical element with unstable neutron number, so that it undergoes spontaneous nuclear disintegration. Major use in biology is to trace the fate of atoms or molecules that follow the same metabolic pathway or enzymic fate as the normal stable isotope, but that can be detected with high sensitivity by their ...
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http://www.encyclo.co.uk/local/20973
(ra″de-o-i´sә-tōp) an isotope that is radioactive, consisting of atoms with unstable nuclei that undergo radioactive decay to stable forms; they emit characteristic radiation in the form of alpha, beta, or gamma rays. These may occur naturally, as in the cases of radium and uranium, or may be created ar...
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An unstable or radioactive isotope (form) of an element that can change into another element by givi
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http://www.encyclo.co.uk/local/22412
Form of a chemical element with unstable neutron number, so that it undergoes spontaneous nuclear disintegration. Major use in biology is to trace the fate of atoms or molecules that follow the same metabolic pathway or enzymic fate as the normal stable isotope, but that can be detected with high sensitivity by their emission of radiation. Also used to locate the position of the radioactive metabolite, as in autoradiography, and to measure relative rates of synthesis of compounds from radioactive precursors.
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Type: Term Pronunciation: rā′dē-ō-ī′sō-tōp Definitions: 1. An isotope that changes to a more stable state by emitting radiation.
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http://www.medilexicon.com/medicaldictionary.php?t=74957
Radioisotope: A version of a chemical element that has an unstable nucleus and emits radiation during its decay to a stable form. Radioisotopes have important uses in medical diagnosis, treatment, and research. A radioisotope is so-named because it is a radioactive isotope, an isotope being an alternate version of a chemical element that has a diff...
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In chemistry, a radioisotope is a radioactive isotope, often used as a tracer in scientific research.
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http://www.probertencyclopaedia.com/browse/GR.HTM
[
n] - a radioactive isotope of an element
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http://www.webdictionary.co.uk/definition.php?query=radioisotope
noun a radioactive isotope of an element; produced either naturally or artificially
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https://www.encyclo.co.uk/local/20974
Naturally occurring or synthetic radioactive form of an element. Most radioisotopes are made by bombarding a stable element with neutrons in the core of a nuclear reactor (see fission). The radiations given off by radioisotopes are easy to detect (hence their use as tracers), can in some instances penetrate substantial thicknesses of materials, and...
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https://www.encyclo.co.uk/local/21221
Injecting a radioactive substance into the body in order to make pictures with a nuclear scanner.
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a radioactive material injected into the body so that a nuclear scanner can make pictures.
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https://www.stanfordchildrens.org/en/topic/default?id=glossary---cardiovasc
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