Origin: a Latin derivative
meaning "Gift of the Earth."
Brazilian researchers reported (September 2015) that, at least in the cases they were looking at, Oregano and Peppermint oil worked better when used together. Synergism is a term that describes what happens when different substances work together to form a combined effect that is greater than the effects of the individual substances on their own. See Thyme and Cassia Synergism for another example of this. Not surprisingly, the aromas of these combinations are also quite compelling!