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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

no·bel·i·um

Audio Help [noh-bel-ee-uh

m, -bee-lee-] Pronunciation Key

–noun Chemistry, Physics.

a transuranic element in the actinium series. Symbol: No; atomic number: 102.

[Origin: 1955–60; < NL; after Nobel Institute, where first discovered; see -ium

]

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

Encyclopædia Britannica, Inc.
nobelium

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American Heritage Dictionary - Cite This Source - Share This

no·bel·i·um Audio Help (nō-běl'ē-əm) Pronunciation Key
n. Symbol No
A radioactive transuranic element in the actinide series with atomic number 102, artificially produced in trace amounts. Its most long-lived isotopes are No 254 with a half-life of 55 seconds, No 253 with a half-life of 1.7 minutes, No 255 with a half-life of 3.1 minutes, and No 259 with a half-life of 58 minutes. See Table at element.

[After Alfred Bernhard Nobel.]

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WordNet - Cite This Source - Share This

nobelium
noun
a radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known

The American Heritage Science Dictionary - Cite This Source - Share This

nobelium Audio Help (nō-běl'ē-əm) Pronunciation Key
Symbol No
A synthetic, radioactive metallic element in the actinide series that is produced by bombarding curium with carbon ions. Its longest-lived isotope is No 255 with a half-life of 3.1 minutes. Atomic number 102. See Periodic Table.

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