| idiot-prodigy | A person of low general intelligence who possesses an unusual faculty in performing certain mental tasks of which most normal persons are incapable. Synonym: idiot-prodigy. Origin: Fr. (05 Mar 2000) |
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| idiot-savant | A person of low general intelligence who possesses an unusual faculty in performing certain mental tasks of which most normal persons are incapable. Synonym: idiot-prodigy. Origin: Fr. (05 Mar 2000) |
| idiotope | An antigenic determinant (epitope) unique to a single clone of cells and located in the variable region of the immunoglobulin product of that clone or to the T-cell receptor. The idiotope forms part of the antigen binding site. Any single immunoglobulin may have more than one idiotope. Idiotopes are also associated with the antigen binding sites of T-cell receptors. They are the epitopes to which an anti-idiotype antibody or T-cell binds. (18 Nov 1997) |
| idiotroph | A commercially-grown fungi or bacterium that has suffered a mutation that renders it unable to synthesise the substances for which it has beencultured. (09 Oct 1997) |
| idiotrophic | Capable of choosing its own food. Origin: idio-+ G. Trophe, food (05 Mar 2000) |
| idiotropic | Turning inward upon one's self. Origin: idio-+ G. Trope, a turning (05 Mar 2000) |
| idiotype | The antigenic specificites defined by the unique sequences (idiotopes) of the antigen combining site. Thus anti-idiotype antibodies combine with those specific sequences, may block immunological reactions and may resemble the epitope to which the first antibody reacts. (18 Nov 1997) |
| idiotype antibody | <immunology> An antibody directed against the antigen specific part of the sequence of an antibody or T-cell receptor and thus recognise the binding sites of other antibodies. In principle an anti-idiotype antibody should inhibit a specific immune response and they are important to the regulation of the immune system. (13 Nov 1997) |
| idiotype autoantibody | <immunology> An autoantibody, the specificity of which is directed against one of one's own idiotypes. See: anti-idiotype antibody. Synonym: idiotype autoantibody. (05 Mar 2000) |
| idiotypic antigenic determinant | The antigenic specificites defined by the unique sequences (idiotopes) of the antigen combining site. Thus anti-idiotype antibodies combine with those specific sequences, may block immunological reactions and may resemble the epitope to which the first antibody reacts. (18 Nov 1997) |