What Does The Metric Prefix 'Milli' Mean?

The term 'milli' is used as a prefix to describe one thousandth of something. You can often come across the term in association with numerous words as it is one of the most common combining forms. You can find the term millilitre, millimetre, milligram and millibar.
    
The term 'millibar' is used to describe a unit for the measurement of pressure in the atmosphere. One thousand millibars are equal to one bar. When you are using the word with other words, the same rule can be applied; millilitre is a word that is used to measure liquids and gases and you can find the use of this term with many of the medicines that are in liquid form and among them cough syrups are the most common.