1. 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
   "His PSA levels were monitored regularly after age 50";
   - prostate specific antigen

Derived forms: PSAs

Type of: protein

Encyclopedia: PSA