colony-forming unit

colony-forming unit
1. any of several hematopoietic stem cells identified by their ability to give rise to monoclonal colonies in the spleen when transplanted into isogeneic, lethally irradiated mice. 2. in microbiology, estimation of the number of bacteria or yeasts by counting the colonies on a solid medium, with one bacterium being considered equal to one colony; some colonies develop from two or more organisms attached to or lying close to each other when inoculated. Abbreviated CFU.

Medical dictionary. 2011.

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