: a person who opposes a person or group in authority. He was a rebel against the school administration. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples. : a person who does not obey rules or accept normal standards of behavior, dress, etc. He is a typical teenage rebel.
antibody-antigen complex. a complex formed by the combining of antibody and antigen. Called also immune complex. Golgi complex. a complex cellular organelle involved in the synthesis of glycoproteins, lipoproteins, membrane-bound proteins and lysosomal enzymes. See also golgi apparatus.
In immunology, an antigen (Ag) is any structural substance that serves as a target for the receptors of an adaptive immune response, TCR or BCR or its secreted form antibody.he term originally described a structural molecule that binds specifically to an antibody. It expanded to refer to any molecule or a linear molecular fragment that can be recognized by highly variable antigen receptors (B-cell receptor or T-cell receptor) of the adaptive immune system.