- of, pertaining to, exhibiting, or caused by radioactivity.
Origin of radioactive
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for radioactive
He was radioactive to those who once valued his political counsel and editorial avidity.Murdoch on the Rocks: How a Lone Reporter Revealed the Mogul's Tabloid Terror Machine
August 25, 2014
The Japanese monster gets a $160 million blockbuster reboot and protects mankind against a pair of radioactive MUTOs.
The Iranians now have most of the know-how and most of the radioactive stuff they need to build a bomb.Iranian Bombs and Black Swans in the Nuclear Negotiations
December 17, 2013
Was the Palestinian leader poisoned by radioactive polonium?Arafat’s Polonium Poisoning Mystery Resurfaces
November 7, 2013
It can contain salts, metals, and sediments that are sometimes toxic or radioactive.Did Floods Cause a Fracking Disaster in Colorado?
September 19, 2013
But in order for radioactive breakdown to occur, time must pass.Equation of Doom
"Eighty-five isn't nearly as radioactive as the elements akin to it," he said.The Raid on the Termites
You see, the radioactive planets your men reported, one of them was—home.Alien Offer
The hull was probably too radioactive to approach from the outside.The Lani People
J. F. Bone
They said she was radioactive, but most of 'em wouldn't believe it.The Onslaught from Rigel
- exhibiting, using, or concerned with radioactivity
Word Origin and History for radioactive
Online Etymology Dictionary, © 2010 Douglas Harper
- Of or exhibiting radioactivity.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.