The word "chocolate" is said to derive from the Mayan "xocoatl";
 

cocoa from the Aztec
"cacahuatl." The Mexican Indian word "chocolate" comes from a
combination of the
terms choco ("foam") and atl ("water"); early chocolate was only
consumed in beverage
form. As part of a ritual in twelfth-century Mesoamerican marriages, a
mug of the
frothy chocolate was shared.