Noun
A nice point of exactness in conduct, ceremony, or proceeding; particularity or exactness in forms; as, the punctilios of a public ceremony.
Source: Webster's dictionaryNot honesty alone, but the punctilio of an honor the most sensitive, is then the standard of behavior. Benjamin N. Cardozo
He would have been a handful in any society. He is a misfit and fully conscious of it. The punctilio of his old-world manners, the dandified scrupulosity of his Savile Row suits, are compelled by an unsleeping awareness that he has no more business among ordinary human beings than a Venusian. Barry Humphries