Aggregating definition, formed by the conjunction or collection of particulars into a whole mass or sum; total; combined: the aggregate amount of indebtedness. See more. Dictionary.com
Originally called Brad's Drink, the beverage was first marketed as a digestive aid and energy booster. It was renamed Pepsi-Cola because of its pepsin and kola nut content.
Pepsin is of particular interest as it was the first enzyme to be discovered. The name pepsin was given by Theodor Schwann (1810-1882) in 1836, and came from pepsis, the term for digestion in Hippocratic writings.