Agathology
The Doctrine or the Science of the Good. This a sub-discipline in the study of ethics. When one engages in metaethics one is engaging in Agathology because one is asking the question “what is good?” As Christians we believe that good is defined in reference to God.
Used in a sentence: Plato practically founded the study of Agathology in the western world when he asked questions about the form of the good.
CWoznicki Think Out Loud 