1) Afp 2) Foe to protein 1) Antigen 2) Foetoprotein 
The album cover of their 2007 compilation album, The Works ...
[n] - any of several antigens that occur naturally in the fetus and sometimes in adults with cancer
fetoprotein An antigen present in the human fetus and in certain pathological conditions in adults. The amniotic fluid level can be used to evaluate fetal development. Elevated serum levels are found in adults with certain kinds of liver diseases.
foetoprotein noun any of several antigens that occur naturally in the fetus and sometimes in adults with cancer