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prostate specific antigen, PSA (noun). a protein manufactured exclusively by the prostate gland; PSA is produced for the ejaculate where it liquifies the semen and allows sperm cells to swim freely; elevated levels of PSA in blood serum are associated with benign prostatic hyperplasia and prostate cancer.see more on Definitions.net Â». protein manufactured exclusively by the prostate gland; PSA is produced for the ejaculate where it liquifies the semen and allows sperm cells to swim freely; elevated levels of PSA in blood serum are associated with benign prostatic hyperplasia and prostate cancer. see more on Definitions.net Â».
Prostate Specific Antigen (PSA) is a protein produced in small quantities by the cells of a healthy prostate gland but is often elevated in the presence of prostate enlargement, prostatitis, or prostate cancer. PSA test involves drawing blood and then sent to a laboratory. The result is due in few days.