Accuracy is the degree of veracity while precision is the degree of reproducibility.
Measurement Uncertainty
Masurement uncertainty is a non-negative parameter characterizing the dispersion of the values attributed to a measured quantity. The uncertainty has a probabilistic basis and reflects incomplete knowledge of the quantity. All measurements are subject to uncertainty and a measured value is only complete if it is accompanied by a statement of the associated uncertainty.
Absolute Uncertainty
This is the simple uncertainty in the value itself as we have discussed it up to now. It is the term used when we need to distinguish this uncertainty from relative or percent uncertainties. If there is no chance of confusion we may still simply say "uncertainty" when refering to the absolute uncertainty. Absolute uncertainty has the same units as the value. Thus it is:
0.1 cm.This is the simple ratio of uncertainty to the value reported. As a ratio of similar quantities, the relative uncertainty has no units. In fact there is no special symbol or notation for the relative uncertainty, so you must make it quite claer when you are reporting relative uncertainty.
0.043 (relative uncertainty)