A class of proteins produced in lymph tissue in vertebrates and that function as antibodies in the immune response

WordNet Word definitions in WordNet
n. a class of proteins produced in lymph tissue in vertebrates and that function as antibodies in the immune response [syn: Ig , immune serum globulin , immune gamma globulin , immune globulin ]

Wiktionary Word definitions in Wiktionary
n. (context protein immunology English) Any of the glycoproteins in blood serum that respond to invasion by foreign antigens and that protect the host by removing pathogens; an antibody.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
immunoglobulin \im`mu*no*glob"ulin\ ([i^]m`m[-u]*n[-o]*gl[o^]b"[-u]*l[i^]n) n. (1953) any one of a class of globular proteins which are antibodies and are produced by the immune system in animals. Note: The immunoglobulins form a series of related proteins ...