transuranic element

trans·u·ran·ic el·e·ment

[trans-yoo-ran-ik, tranz-, trans-, tranz-]
noun Chemistry, Physics.
any element having an atomic number greater than 92, the atomic number of uranium. All such elements are radioactive and can be synthesized by bombarding a heavy element with a light particle or element. See also transactinide element.
Also, trans·u·ra·ni·um el·ement [trans-yoo-rey-nee-uhm, tranz-] .


Origin:
1930–35; trans- + uran(ium) + -ic

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WordNet
transuranic element

noun
any element having an atomic number greater than 92 (which is the atomic number of uranium); all are radioactive 
WordNet® 3.0, © 2006 by Princeton University.
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00:10
Transuranic element has a plethora of syllables.
So is pneumonoultramicroscopicsilicovolcanoconiosis. Does it mean:
a white, crystalline, water-insoluble, powerful high explosive, C3H6N6O6, used chiefly in bombs and shells.
an obscure term ostensibly referring to a lung disease caused by silica dust, sometimes cited as one of the longest words in the English language.
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