Welcome Buwaya. These terms technically apply to the Indonesian keris, not it's Moro cousin, but since these blades are so similar in form we can get away with using them. You can see them more closely compared in the last 2 photos that Rick posted. We are referring to the filed out shapes on both the main part of the blade and on the seperate piece (which is most often called the gangya on Moro kris and the gonjo or ganja on Indonesian keris). Hope that helps.
