Punc*til"io (?), n.; pl. Punctilios (#). [It. puntiglio, or Sp. puntillo, dim. fr. L. punctum point. See Point, n.]
A nice point of exactness in conduct, ceremony, or proceeding; particularity or exactness in forms; as, the punctilios of a public ceremony.
They will not part with the least punctilio in their opinions and practices.
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© Webster 1913.