Biocompatible

A Biocompatible material is a natural or synthetic substance with "the quality of not having toxic or injurious effects on biological systems" (Dorland 2003). Examples of biocompatible materials are titanium, PTFE, stainless steel, niobium, and silicone; however, all must be of medical-grade for use as implant or piercing jewelry.

Sources

• Dorland's Illustrated Medical Dictionary (2003) ISBN: 0721601464 (Find this at Amazon.com)