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

  • n. An unspecialized cell that gives rise to a specific specialized cell, such as a blood cell.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A primal undifferentiated cell from which a variety of other cells can develop through the process of cellular differentiation.

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

  • n. an undifferentiated cell whose daughter cells may differentiate into other cell types (such as blood cells)


Sorry, no etymologies found.


  • No offense to the true believers, but it’s hard to get any serious business done with someone from the God Squad twisting your ear about the evils of stem cell research while an NRA lifer demands your assurance that the black helicopters won’t be swooping down to deprive him of his twin-mounted .50-caliber Brownings.

    How to Rig an Election

  • Then, while waiting in line, a man came up to me, maybe in his mid-thirties, dressed in chinos and a golf shirt, and told me that he hoped Congress would do something about stem cell research this year.

    The Audacity of Hope

  • I like to tell myself that I will continue to weigh the issues on the merits-just as I hope my Republican counterpart will weigh the no-new-tax pledge or opposition to stem cell research that he made before the election in light of what’s best for the country as a whole, regardless of what his supporters demand.

    The Audacity of Hope

  • The stakes involved in Washington policy debates are often so high-whether we send our young men and women to war; whether we allow stem cell research to go forward-that even small differences in perspective are magnified.

    The Audacity of Hope

  • Remembering the recent controversies surrounding stem cell research, I asked him whether the Bush Administration’s limitation on the number of stem cell lines was the biggest impediment to advances in his field.

    The Audacity of Hope

  • Mesoblast is using adult stem cell technology to develop therapies for conditions including cardiovascular illness, diabetes and bone fractures.

    Australian Drug Upstarts Draw Investor Interest

  • But then some factor within the stem cell activated the appropriate genes and that cell’s destiny was determined.

    Fatal Care


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