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from The American HeritageĀ® Dictionary of the English Language, 4th Edition

  • n. See vitamin B12.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of several substances depending on the upper axial ligand of the cobalt ion.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a B vitamin that is used to treat pernicious anemia


cobal(t) + (vit)amin.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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