from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of, exhibiting, or caused by radioactivity.
- adj. Informal Extremely sensitive or controversial: "Perhaps race is now too radioactive a topic, in an era of political correctness” ( David Nyhan).
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Exhibiting radioactivity.
from the GNU version of the Collaborative International Dictionary of English
- adj. Capable of luminescence under the action of cathode rays, X rays, or any of the allied forms of radiation.
- adj. of, exhibiting, or caused by radioactivity.
from The Century Dictionary and Cyclopedia
- Exhibiting or pertaining to radioactivity (which see): as, radioactive substances.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. exhibiting or caused by radioactivity
Sorry, no etymologies found.
NGUYEN: And hence the term radioactive, which you just referred to.
Nowadays we label radioactive stuff with a bright yellow trefoil rather than sip it during dinner.
In 1913 Richards had discovered that the atomic weight of natural lead and of that formed in radioactive decay of uranium minerals differ.
(Presumably, the need for a license is a matter of degree, given that our own bodies contain radioactive potassium-40, and given that the walls of most buildings contain the radioactive isotopes from the natural uranium-238 and thorium-232 decay chains).
The BBC has reported that short-term radioactive iodine has been detected at very high levels in the Pacific Ocean near the plant.
Is “radioactive externalities” the code word for a $Trillion loss of downwind property if a core meltdown occurs and a steam explosion breechs the containment building?
Uranium and its decay products are both radioactive and toxic and, as they remain radioactive for hundreds of thousands of years, can cause irreparable damage to the environment and to generations of local communities.
The opening credits, with typicallybeligerent music from Iggy Pop, lights up a series of road maps in radioactive greens, taking the viewer on the road to nuclear Hell.
It is believed the packages may contain radioactive material.
Emergency services have placed a cordon around the Regent Language Training School after the discovery of three small packages that may contain radioactive material.