1. A sign, mark, or indication of something; evidence or proof.
Usage: formal; rare in modern English; primarily used in legal or academic contexts
2. In Roman law, a mark or sign placed on property to indicate ownership or status.
Usage: historical; legal

Examples

• The broken seal served as an indicium of tampering.
• Ancient coins bore an indicium of the emperor's authority.
• The document contained several indicia of authenticity.
• In legal proceedings, the indicium must be clearly documented.
• The indicium on the artifact helped scholars date its origin.