neptunium
/nɛpˈtjuːnɪəm
/noun [mass noun]
The chemical element of atomic number 93, a radioactive metal of the actinide series. Neptunium was discovered as a product of the bombardment of uranium with neutrons, and occurs only in trace amounts in nature. (Symbol: Np) Each tank round is 10 pounds of solid uranium - 238 contaminated with plutonium, neptunium, americium....
- In Basra they have found the bombs that were used had enriched uranium in them - neptunium.
- Just as Neptune comes right after Uranus in the solar system, so, too, does neptunium come right after uranium in the periodic table.
Origin
Late 19th century: from Neptune, on the pattern of uranium (Neptune being the next planet beyond Uranus).
- colour slide
- colour snap
- colour solid
- colour space
- colour suite
- colour supplement
- colour symmetry
- colour television
- colour temperature
- colour therapist
- colour therapy
- colour tone
- colour top
- colour transparency
- colour-treat
- colour-treated
- colour triangle
- colour twist
- colour type
- colour value
- colour vision
- colour wash
- colourway
- colour-weak
- colour weakness