What is the meaning of cmmol in chemistry?

I came across a unit called $\text{cmmol dm}^{-3}$ in buffer solutions. What does this unit mean?




Upon researching this, I found that this a measurement of charge:


$$\mathrm{cmol=10~\mathrm{meq}}$$


and


$$1~\mathrm{eq}= \mathrm{F}$$


where $\mathrm{F}$ is Faraday's constant and is:


$$\mathrm{F}=96 485.3365~\mathrm{C}$$


So:


$$\mathrm{cmmol}=\frac{\mathrm{cmol}}{1000}=\frac{\mathrm{eq}}{100000}=.96 4853365~\mathrm{C}$$


Sources:


<http://en.wikipedia.org/wiki/Equivalent_%28chemistry%29>


<https://www.agronomy.org/files/publications/jnrlse/pdfs/jnr014/014-02-0084.pdf>


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The unit $cmmol\,dm^{-3}$ is the same as $mmol\_{c}\,dm^{-3}$ which denotes the millimoles of charge per litre. I think the former notation is not well used anymore. On the other hand, latter is used often and a google search would return a number of references. For example,


<http://micromaintain.ucanr.edu/Prediction/Source/Groundwater/Potential_for_clogging/CP/Water_analysis_for_hazard/Levels_of_concern/>


<http://www.slidefinder.net/c/converting_various_units_mmol_mmolc/32208520>


<http://www.scielo.br/scielo.php?pid=S0103-90162011000400012&script=sci_arttext>


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