Dictionary![]() ![]() no•bel•i•umPronunciation: (nō-bel'ē-um, -bē'lē-), [key] —n. Chem., Physics. a transuranic element in the actinium series. Symbol: No; at. no.: 102. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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