American Heritage® Dictionary of the English Language, Fourth Edition
- n. A naturally radioactive, silvery, metallic transuranic element, occurring in uranium ores and produced artificially by neutron bombardment of uranium. Its longest-lived isotope is Pu 244 with a half-life of 76 million years. It is a radiological poison, specifically absorbed by bone marrow, and is used, especially the highly fissionable isotope Pu 239, as a reactor fuel and in nuclear weapons. Atomic number 94; melting point 640°C; boiling point 3,235°C; specific gravity 19.84; valence 3, 4, 5, 6. See Table at element.
- n. The transuranic chemical element with atomic number 94 and symbol Pu.
- n. a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactors; 13 isotopes are known with the most important being plutonium 239
- After Pluto (the entity formerly considered to be a planet). (Wiktionary)
- After the dwarf planet Pluto (from the fact that it follows neptunium in the periodic table). (American Heritage® Dictionary of the English Language, Fourth Edition)
““I'm sure that in 1985 plutonium is available in every corner drugstore, but in 1955 it's a little hard to come by.””
“In 2007, North Korea shut down its main plutonium-producing plant and agreed to end all nuclear programs in exchange for aid and diplomatic concessions.”
“The half-life of (radioactive) plutonium is about 77,000 years.”
“To reduce the risk of proliferation in the ME and help lay the basis for a regionwide nuclear weapon free zone, the US must ensure that plutonium is not separated from irradiated reactor fuel, insist on adequate international inspections of these countries, including the adoption of the Additional Protocol, and develop mechanisms to remove spent fuel from the region.”
“Given that just 8 kg of plutonium is enough to fabricate a nuclear weapon, this figure is significant.”
“Or we could convince congress to let NASA buy plutonium from the Russians, but their stocks are only a little larger than ours, and they aren't currently producing either.”
“And plutonium is difficult to handle — sufficiently radioactive to require shielding, awkward to transport without setting off radiation detectors, and extremely dangerous even in minute quantities if it is breathed in, swallowed, or absorbed through a cut or open wound.”
“Plutonium might work as the pollutant spread by a dirty bomb, but for your project, plutonium is out.”
“It requires chemical separation of plutonium from the other elements in spent fuel through a complex process that is much harder than using centrifuges to enrich uranium.”
“The way you make plutonium is you run a reactor and after a few weeks or months you take the fuel rods out and put them in big vats of acid.”
These user-created lists contain the word ‘plutonium’.
nuclear fuel, nuclear arsenal, nuclear equipment, AWACS, anti-missile shield, battlefield opera..., communication sys..., community communi..., control system, functionality log..., Missile Technolog..., NBC Warning and R... and 302 more...
includes words of the "Prodcom list"
Interesting gene names. Some of these may have changed recently (to something less offensive/funny).
tinman, agnostic, dreadlocks, Van Gogh, fruitless, lava lamp, ariadne, cheap date, ken and barbie, I'm not dead yet, I'm not dead yet 2, manic fringe and 1192 more...
A list of chemical elements
Words derived from names, be they historical, literary, or mythological.
Words for things both tangible and nonanthropic
By David Mitchell
Looking for tweets for plutonium.