Medical Definition of alanine aminotransferase
: an enzyme which promotes transfer of an amino group from glutamic acid to pyruvic acid and which when present in abnormally high levels in the blood is a diagnostic indication of liver disease—abbreviation ALT; called also glutamic pyruvic transaminase
Seen and Heard
What made you want to look up alanine aminotransferase? Please tell us where you read or heard it (including the quote, if possible).