| NOUN | substance | PSA, prostate specific antigen | a protein manufactured exclusively by the prostate gland |
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| Meaning | 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. | |
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| Synonym | prostate specific antigen | |
| Broader | protein | Any of a large group of nitrogenous organic compounds that are essential constituents of living cells |
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