- a protein, produced by the prostate, elevated levels of which may indicate the presence of cancer.
- an audio or video spot or advertisement to educate or promote awareness about health, safety, civics, etc.
- positive security assurance.
- prostatic specific antigen: an enzyme secreted by the prostate gland, increased levels of which are found in the blood of patients with cancer of the prostate
- (in New Zealand) Public Service Association
