immunoglobulin a immunoglobulin • immunoglobulin d · · · Info · Definitions · Synonyms · Characters · · immunoglobulin a · · Text Common · · Latin · · Scripts 16 · · Length 7 · · Syllables Definitions · · · (noun) one of the most common of the five major classes of immunoglobulins; the chief antibody in the membranes of the gastrointestinal and respiratory tracts. Synonyms: immunoglobulin A, IgA. · · Noun Definition 1 Synonyms · · · iga · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 g latin small letter g U+0067 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F u latin small letter u U+0075