| PPD | <abbreviation> Purified protein derivative of tuberculin. (05 Mar 2000) |
|---|---|
| ppd test | <dermatology, investigation> A simple skin test used to detect prior exposure to tuberculosis. PPD is injected under the skin of the forearm. After 48 to 72 hours, the injection site will exhibit a red, hard bump if a person has been infected with tuberculosis. (09 Oct 1997) |