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
"The doctor ordered a blood test to check his PSA levels because an elevation could indicate either benign prostatic hyperplasia or prostate cancer."
Initialism of prostate-specific antigen.
"The doctor ordered a blood test to check his PSA levels as part of routine cancer screening."
In plain English: A PSA is an announcement made by public officials to warn people about important health issues or safety tips they should know.
"The doctor sent me home with a PSA test to check for prostate cancer."
Initialism of Pacific Southwest Airlines.
"The flight log showed that PSA had diverted several planes due to unexpected weather conditions in 1987."
The word PSA is an English initialism formed from the letters of the phrase prostate-specific antigen. It entered medical usage to describe a protein produced by cells that can be measured as part of screening for prostate cancer.