Antibodies, Anti-Endomysium (EMA): definition Posted by: Cleo Libonati, RN, BSN in DICTIONARY 0 2,093 Views Auto-antibodies that are produced against endomysium, a connective tissue in muscles, by persons who have inherited the genes for celiac disease, an auto-immune disorder triggered by ingestion of gluten in the diet. Glossary. 2013-04-08 Cleo Libonati, RN, BSN