PRONUNCIATION: (dee-ahn-TAH-luh-jee)

MEANING: noun: The theory or study of duty and obligation, with a focus on the right action as determined by a set of rules, irrespective of the consequences of the action.

ETYMOLOGY: From Greek deont- (obligation) + -logy (study). Earliest documented use: 1829.

DENTOLOGY - knowleldge of teeth

DON'T-OLOGY - the art of proscribing

ODEONTOLOGY - the study of grand roofed performance venues

DEO-NATOLOGY - lore pertaining to the birth of the gods