from The American Heritage® Dictionary of the English Language, 4th Edition
- n. 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a transuranic chemical element (symbol No) with an atomic number of 102.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known
After Alfred Bernhard Nobel.(American Heritage® Dictionary of the English Language, Fourth Edition)
Named for Alfred Nobel. (Wiktionary)