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
2.
(in New Zealand) Public Service Association
3.
public service announcement
PSA in American English1
(ˌpiˌɛsˈeɪ)
nounWord forms: pluralPSAs
1.
an enzyme secreted by the prostate gland
2.
a blood test used to detect prostate cancer by determining if elevated levels of this enzyme are present in the blood