a bodily defense reaction that recognizes an invading substance (an antigen: such as a virus or fungus or bacteria or transplanted organ) and produces antibodies specific against that antigen | something added to complete or embellish or make perfect |
| either of two parts that mutually complete each other |
| a word or phrase used to complete a grammatical construction |
| number needed to make up a whole force |
| a complete number or quantity |
| one of a series of enzymes in the blood serum that are part of the immune response |