| bivalent | <genetics> Used of two homologous chromosomes when they are in synapsis during meiosis. (18 Nov 1997) |
|---|---|
| bivalent antibody | Antibody that causes a visible reaction with specific antigen as in agglutination, precipitation, and so on; so-called because according to the "lattice theory" aggregation occurs when the antibody molecule has two or more binding sites that can crosslink one antigen particle to another; probably a characteristic of the class of immunoglobulin. (05 Mar 2000) |
| bivalent chromosome | A pair of chromosome's temporarily united. (05 Mar 2000) |
| bivalent gas gangrene antitoxin | Antitoxin specific for the toxins of Clostridium perfringens and C. Septicum. (05 Mar 2000) |