Try Our Apps
Dictionary.com

follow Dictionary.com

Avoid these words. Seriously.

radioisotope

[rey-dee-oh-ahy-suh-tohp] /ˌreɪ di oʊˈaɪ səˌtoʊp/
noun
1.
a radioactive isotope, usually artificially produced: used in physical and biological research, therapeutics, etc.
Origin of radioisotope
1940-1945
First recorded in 1940-45; radio- + isotope
Related forms
radioisotopic
[rey-dee-oh-ahy-suh-top-ik] /ˌreɪ di oʊˌaɪ səˈtɒp ɪk/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
British Dictionary definitions for radioisotope

radioisotope

/ˌreɪdɪəʊˈaɪsətəʊp/
noun
1.
an isotope that is radioactive
Derived Forms
radioisotopic (ˌreɪdɪəʊˌaɪsəˈtɒpɪk) adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for radioisotope
n.

1946, from radio-, comb. form of radiation, + isotope.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
radioisotope in Medicine

radioisotope ra·di·o·i·so·tope (rā'dē-ō-ī'sə-tōp')
n.
A naturally or artificially produced radioactive isotope.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
radioisotope in Science
radioisotope
  (rā'dē-ō-ī'sə-tōp')   
A radioactive isotope of a chemical element. Carbon 14 and radon 222 are examples of naturally occurring radioactive isotopes.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Nearby words for radioisotope

Difficulty index for radioisotope

Few English speakers likely know this word

Word Value for radioisotope

0
16
Scrabble Words With Friends