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F.Y.R.O.M.
F2F
F2T
FA
fa
FA Cup
fa-la
FAA
Fab
fab
Fabian
Fabian Society
fable
fabled
fabliau
Fablon
fabric
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Fab

Fab [ fab ] (plural Fabs)


noun 
Definition:
 
part of antibody molecule: the half of an immunoglobulin molecule to which a relevant antigen binds when the molecule splits as a result of digestion with the enzyme papain. The other half is an Fc.
Full form  fragment antigen-binding


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